Review of Enhanced Reduced Magnetic Dipole Transition Probabilities (BM1W>0.4) in ENSDF (March 2007 version) Balraj Singh and Scott Geraedts Department.

Slides:

Advertisements

Similar presentations

GOSIA As a Simulation Tool J.Iwanicki, Heavy Ion Laboratory, UW.

Advertisements

M3.1 JYFL fission model Department of Physics, University of Jyväskylä, FIN-40351, Finland V.G. Khlopin Radium Institute, , St. Petersburg, Russia.

Boris Pritychenko NSDD Meeting, Saint-Petersburg, Russia, June 11-15, 2007 B(E2) and ββ-decay evaluation and compilation Boris Pritychenko* National Nuclear.

 -Ray Emission Probabilities Edgardo Browne Decay Data Evaluation Project Workshop May 12 – 14, 2008 Bucharest, Romania.

Neutron Activation Decay Data Richard B. Firestone Isotopes Project, Lawrence Berkeley National Laboratory, Berkeley, CA DDEP Workshop 8-10 October.

XUNDL status report (Includes compilation of recent mass measurement papers) (April 1, 2011 – Jan 31, 2013) Balraj Singh (McMaster University) IAEA-NSDD-2013.

Nuclear Science References Boris Pritychenko National Nuclear Data Center, BNL, Upton, NY

Brookhaven Science Associates U.S. Department of Energy ENSDF Analysis and Utility Codes Presentation for the ICTP-IAEA Workshop on Nuclear Structure and.

RadD A source code for the deduction of Radius Parameter (r 0 ) for odd-A and odd-odd Nuclei Sukhjeet Singh and Sushil Kumar Maharishi Markandeshwar University.

Introduction to Nuclear Chemistry. © 2009, Prentice-Hall, Inc. The Nucleus Remember that the nucleus is comprised of the two nucleons, protons and neutrons.

Laboratoire National Henri Becquerel DDEP Training session – Bucharest - May 12-14, New improvements to Saisinuc program Saisinuc in a few words.

Introduction Radioactive nuclei decay in numerous ways: emitting electrons, protons, neutrons, alpha particles, gamma rays, x-rays, or some combination.

Recycling NuDat Programs A.A. Sonzogni, T.D. Johnson, E.A. McCutchan, National Nuclear Data Center Brookhaven National Laboratory Building 817 Upton, NY.

1Laboratoire National Henri Becquerel Decay data evaluation of Radium – 226 and its daughters V. Chisté, M. M. Bé, C. Dulieu.

Status Report of the Nuclear Structure and Decay Data evaluation activities at the Australian National University ( ) T. Kibèdi Tibor Kibèdi, Dep.

Brookhaven Science Associates U.S. Department of Energy Bibliographic Databases in Support of NSDD Evaluations Presentation for the ICTP-IAEA Workshop.

Jag Tuli NSDD, Vienna, 4/2015 ENSDF Policies 4/15 Jagdish Tuli* National Nuclear Data Center Brookhaven National Laboratory * Brookhaven.

Compilation and Evaluation of Beta-Delayed Neutron emission probabilities and half-lives of precursors in the Non-Fission Region (A ≤ 72) M. Birch and.

Jag Tuli DDP08 Bucharest, Romania, May 08 NNDC Data Services Jagdish K. Tuli National Nuclear Data Center Brookhaven National Laboratory Upton, NY

Isotopes Mass Defect E = mc2

Boris Pritychenko Nuclear Physics Data Compilation for Nucleosynthesis Modeling, Trento, May 29 – June 1, 2007 MACS and Astrophysical Reaction Rates from.

CMD-2 and SND results on the  and  International Workshop «e+e- Collisions from  to  » February 27 – March 2, 2006, BINP, Novosibirsk, Russia.

XUNDL Status Report: (May 21, 2005 – May 31, 2007) B. Singh, S. Geraedts, M. Mitchell, J.C. Roediger (McMaster) D.F. Winchell, J.K. Tuli, T.W. Burrows.

International Atomic Energy Agency Reference Input Parameter Library (RIPL)-Levels Marco Verpelli and Roberto Capote Noy IAEA - Nuclear Data Section NSDD.

A=193 Mass Chain evaluation: A summary IAEA-ICTP Workshop on Nuclear Structure and Decay Data: Theory and Evaluation, Trieste, Italy November

Jag Tuli NSDD Meeting, St Petersburg, June 07 Evaluator-Reminders 6/07 Jagdish Tuli* National Nuclear Data Center Brookhaven National Laboratory *

Modernizing of Drawings and Tables for Nuclear Data Sheets Project between NNDC, BNL & Roy Zywina. (Some participation by B. Singh) (Work Started March.

WHAT VALUES ARE BEST RECOMMENDED FOR ALPHA- AND GAMMA- ENERGIES IN DECAYS OF ACTINIDES? Valery Chechev V.G. Khlopin Radium Institute, Saint Petersburg,

Agenda Structure Group Discussions NSDD/ENSDF Long Range Planning: (Monday Afternoon) – Priorities and characterization of user base What is the.

Completed compilation and evaluation of experimental Pn and half-lives for nuclei in Z=2-28 region Balraj Singh (McMaster University, Canada) 2 nd RCM.

ENSDF: Consistency (or lack thereof) in J π assignments (including Multipolarities) Balraj Singh McMaster University, Canada IAEA-ENSDF Workshop, Vienna.

Thomas W. Burrows NSDD 2007, St. Petersburg June 11-15, 2007 Status of the ENSDF Analysis & Utility Codes Thomas W. Burrows* National Nuclear Data Center.

B. Singh and M. Birch 02/05/2013Beta-Delayed Neutron Data Evaluation Compilation and Evaluation of %P n and T 1/2 Data for β-delayed Neutron Emitters Balraj.

139 Ba decay: precise half-life measurement and gamma-spectroscopy at BARC: an offshoot of ENSDF evaluation work. P.K.Joshi Homi Bhabha Centre for Science.

JAVA-GAMUT and V.AveLib Update Michael Birch – Presented by Balraj Singh McMaster University, Canada IAEA-NSDD Meeting, Vienna April 20-24, 2015.

Spectral Analysis of Archival SMM Gamma-Ray Flare Data Gerald Share 1,2, Ronald Murphy 2, Benz Kozlovsky 3 1 UMD, 2 NRL, 3 Tel Aviv Univ. Supported under.

Evaluating multipole mixing ratio from conversion electron data Tibor Kibèdi Tibor Kibèdi, Dep. of Nuclear Physics, Australian National University 28-Apr-2015,

Jag Tuli NSDD-April, 2011 Nuclear Data Sheets/ENSDF 04/11 Jagdish Tuli* National Nuclear Data Center Brookhaven National Laboratory *

Anti-neutrinos Spectra from Nuclear Reactors Alejandro Sonzogni National Nuclear Data Center.

Isotopes Mass Defect E = mc 2. Isotopes Thanks to the mass spectrometer Physicists were able to measure the mass of the atoms of elements. In this way.

International Atomic Energy Agency D. Abriola Nuclear Data Section Department of Nuclear Sciences and Applications 20 th NSDD Meeting, Kuwait, Jan

Alejandro SonzogniNSDD 2007 Nuclear Wallet Cards and ENSDF compatibility Alejandro Sonzogni National Nuclear Data Center Brookhaven National Laboratory.

Korea Atomic Energy Research Institute (KAERI) Jounghwa Lee 21st NSDD Meeting, Vienna, Austria, April 2015.

Jag Tuli Vienna Nov 10-11, 2008 NNDC Databases and Services Jagdish Tuli* National Nuclear Data Center Brookhaven National Laboratory *

Jag Tuli NSDD, Vienna, 4/2015 Evaluator Reminders 4/15 Jagdish Tuli* National Nuclear Data Center Brookhaven National Laboratory * Brookhaven.

Caroline D. Nesaraja, Michael S. Smith NUCLEAR DATA ACTIVITIES AT OAK RIDGE NATIONAL LABORATORY.

When latest data differ from earlier ones: An example of 187 Hg Shamsuzzoha Basunia Lawrence Berkeley National Laboratory Berkeley, CA Specialized.

Alejandro SonzogniNSDD 2007 Decay Data Library In ENDF/B-VII Alejandro Sonzogni National Nuclear Data Center Brookhaven National Laboratory

Radiochemistry Dr Nick Evans

NUCLEAR LEVEL DENSITIES NEAR Z=50 FROM NEUTRON EVAPORATION SPECTRA IN (p,n) REACTION B.V.Zhuravlev, A.A.Lychagin, N.N.Titarenko State Scientific Center.

E. Browne & J. Tuli USNDP Annual Meeting November 7-9, 2006 Absolute and Relative  -Ray Intensities in ENSDF E. Browne # and J.K. Tuli* National Nuclear.

TUNL Contributions in the US Nuclear Data Program Nuclear Structure Data Evaluation Program J.H. Kelley - USNDP Structure Group Leader: (6 months FTE),

Pavel Oblozinsky NSDD’07, St. Petersburg June 11-15, 2007 Report on the US Nuclear Data Program Pavel Oblozinsky National Nuclear Data Center Brookhaven.

Action item #34 from NSDD-2005 IAEA-NSDD-07 Meeting St. Petersberg, Russia June 11-15, 2007 Action On: B. Singh (McMaster), F.G. Kondev (ANL) Active Participants:

 The spontaneous emission of radiation › Created by unstable nuclei of very heavy elements › Radioactive elements can give off 3 types of radiation:

Nuclear Chemistry. The Atom The atom consists of two parts: 1. The nucleus which contains: 2. Orbiting electrons. protons neutrons.

Brookhaven Science Associates U.S. Department of Energy Description and Use of HSICC ( Hager-Seltzer Internal Conversion Coefficients ) and BrIcc (Band-Raman.

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Nuclear Astrophysics Resources of the National Nuclear Data Center B. Pritychenko*, M.W. Herman,

Pavel Oblozinsky NSDD’07, St. Petersburg June 11-15, 2007 ENDF/B-VII.0 Library and Use of ENSDF Pavel Oblozinsky National Nuclear Data Center Brookhaven.

ENSDF - NuDat Alejandro Sonzogni Needs and Links to ENSDF/NuDat Alejandro Sonzogni National Nuclear Data Center Brookhaven National Laboratory Upton, NY.

Jag Tuli NSDD, Vienna 4/2015 ENSDF/NDS Status Jagdish Tuli* National Nuclear Data Center Brookhaven National Laboratory * Brookhaven.

Jag Tuli NSDD Meeting, St Petersburg, June 07 Nuclear Wallet Cards 6/07 Jagdish Tuli* National Nuclear Data Center Brookhaven National Laboratory *

Example of Evaluation: Decay of 177 Lu (6.647 d) Filip G. Kondev 2 nd Workshop for DDEP Evaluators, Bucharest, Romania May 12-15,2008.

Jun Chen Department of Physics and Astronomy, McMaster University, Canada For the McMaster-NSCL and McMaster-CNS collaborations (5.945, 3+ : **) (5.914,

“Energy & Transmutation of Radioactive Waste“ collaboration workshop Řež, from June 4 up to June 8 1 Nuclear Physics Institute Řež Methodical comments.

David F. Winchell NSDD Meeting June 11-15, 2007 NSR David F. Winchell* National Nuclear Data Center Brookhaven National Laboratory *

Report (2) on JPARC/MLF-12B025 Gd(n,  ) experiment TIT, Jan.13, 2014 For MLF-12B025 Collaboration (Okayama and JAEA): Outline 1.Motivation.

Ciemat Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas D. Cano-Ott, 6 th Geant4 Space Users Workshop Evaluated neutron cross section.

Contribution of Universities to the US-NDP

Magnetic dipole excitation and its sum rule for valence nucleon pair

Presentation transcript:

Review of Enhanced Reduced Magnetic Dipole Transition Probabilities (BM1W>0.4) in ENSDF (March 2007 version) Balraj Singh and Scott Geraedts Department of Physics and Astronomy, McMaster University, Hamilton, Canada IAEA-NSDD-07 meeting St. Petersburg, Russia June 11-15, 2007

Introduction From 1974 to 1993 P.M. Endt published 6 articles on the compilation and evaluation of BELW and BMLW values in different mass regions. Values of RULs based on 5 publications ( ) have been used in ENSDF for spin-parity assignments and other parameters. In March 2007, we were approached by a physicist from Notre Dame about some recent compilation of (very) fast M1 transitions e.g. BM1W>0.4 or so. Through a code written at McMaster, complete ENSDF was scanned for BM1W>0.4 in different mass regions as classified by Endt. Nuclide, level energy, gamma-ray energy and BM1W value are tabulated for each region. The survey is presented in this work. It reveals possible need for reassessment of the RUL values for M1 transitions.

Published BM1W values for A=6-44 (by P.M. Endt) ADNDT 13, 67 (1974): RUL=10; A= En05: NP A 235, 27: RUL=10; A= En05: ADNDT 23, 3 (1979): RUL=10; A= En03: ADNDT 55, 171: RUL=10 for A=6-20; RUL=5 for A=21-44 (not considered for ENSDF!) Highest values: 10.8(20) for 18 F: 1041γ g.s. transition (not in Endt’s 1974 papers); 8.6(2) for 6 Li: 3560γ g.s transition; 4.3(5) for 40 Ca. ENSDF: RUL=10 for A=6-44 (ref: 1979En05)

A=6-44 Our search of ENSDF shows 118 values above 0.4 W.u. in this region The highest value is 10.9(21) W.u. for Eγ=1041 keV g.s. transition from the E=1041 level in 18 F.

BM1W>0.4 vs. Mass number (6-20) RUL

BM1W>0.4 in A=6-20 mass range RUL

BM1W>0.4 vs. Mass number (21-44) RUL RUL=5

BM1W>0.4 in A=21-44 mass range

A= En04: Endt: ADNDT 23, 547: RUL=3 from highest value of 2.5(4) for 56 Fe. However, this value is erroneous. The branching ratios of the two gamma rays from 3756, 6+ level got reversed! (Strange Endt error!! Even Homer and Vyāsa took a nap now and then …… ). The value should be 0.6. The next highest value in Endt’s paper was 1.6(5) for 940γ from 1330 level in 50 V. ENSDF: RUL=3 (ref. 1979En04, 1981En06). Our search of ENSDF found 119 values with BM1W>0.4 W.u. The highest value now is 2.3(6) for 54.5-keV g.s. transition in 54 Mn.

BM1W>0.4 vs. Mass number (45-90) RUL

BM1W>0.4 in A=45-90 mass range RUL

A= En06: Endt: ADNDT 26, 27: RUL=1 from value of 0.50(8) for 30-keV g.s. transition in 140 La. ENSDF: RUL=3 for A= (ref. 1979En04,1981En06) Our scan shows there are 84 values >0.4 in ENSDF There are seven values with BM1W>3; and 26 values >1.

NUCLIDEElevelEgammaBM1WJπJπ 91MO (31/2-) 109IN (19) (23/2-) 113SN (3) 7/2+ 113CD (12) (3/2+) 113CD (13) (3/2+) 136ND (17) (24+) 136ND (15) (23+) 142EU X (5) CE (3) 4+ Highest BM1W values A=91-150

BM1W>0.4 vs. Mass number RUL

Number of occurrences of BM1W values RUL

A>150 ● No published compilation of BM1W data ● The current RUL=2 is based on scan of data in ENSDF (version ~1980) by M. Martin: first appeared in NDS 36, Sept issue. ● Our search found 80 BM1W values >0.4 W.u. ● 20 of these transitions are above the RUL=2; the highest being 5.8(21), for 273.8γ from level in 199 Pb. ● Most of these are in the region Pb; and for magnetic-dipole rotational bands.

Highest BM1W values A>150 NUCLIDEElevelEgammaBM1WJπJπ 194PB (4)(22-) 194PB (3)(21-) 194PB (+13-9)(20-) 197PB (12)51/2+ 198PB (6)(29+) 198PB (7)(28+) 198PB (10)(27+) 198PB (3) PB (12) PB (3) PB (6) PB Y (16)(49/2+) 199PB Y (3)(47/2+) 199PB X (9)(53/2-) 199PB X (9)(51/2-) 199PB X (20)(49/2-) 199PB X (21)(47/2-) 199PB X (+4-3)(45/2-) 199PB X (+4-3)(43/2-) 208TL (3)4(+)

BM1W>0.4 vs. Mass number >150 RUL

Number of occurrences of each BM1W value RUL

4165 transitions. Average BM1W=0.176 Most probable value=0.040

Errors found in ENSDF due to use/misuse of RULER code Some of the values in ENSDF were found to be unrealistically high. NUCLEUSLEVELGAMMABM1W 32 S V Na Na This is due to the misuse of the RULER code The RULER code does not take into account proton (or neutron, α-particle) decay branches when calculating BM1W values from energy levels above the proton (or neutron) separation energy, when the full width Γ (or total T 1/2 ) is given in a dataset.

Errors found in ENSDF due to use/misuse of RULER code (contd.) These errors have been communicated to NNDC/Evaluators for corrections in ENSDF. It is possible that there are other incorrect B(E,M)W values in ENSDF because proton or other particle branches may not have been considered in using RULER code. (ENSDF entries need to be checked.) All values affecting current RUL were re-evaluated, thus the highest values for different mass regions given in this report should be reliable.

Changes to the RULER program The RULER program will be upgraded to correct for this problem as will soon be shown in a presentation from Tom Burrows (BNL).

Summary Mass Region Endt RUL ENSDF RUL Number of values above RUL Highest value Possible new RUL (21)12? (5)5? (6) ,75.2(19)7? > (21)8?

Conclusions Our current survey of BM1W values shows need to reassess RUL. It is possible that other multipolarities also need to be reassessed based on more recent ENSDF entries. Many current values of BELW and BMLW in ENSDF may be incorrect due to use/misuse of the RULER code.

RULER Upgrades Thomas W. Burrows* National Nuclear Data Center Brookhaven National Laboratory Presented by Balraj Singh * Brookhaven Science Associates

RULER Upgrades RULER must be upgraded to properly handle gamma transitions from states where there is competition between gamma decay and particle emission (e.g., proton or neutron emission) Thomas W. Burrows NSDD 2007, St. Petersburg June 11-15, 2007

RULER Upgrades (cont.) The following will be done: –If WIDTHG given on Gamma continuation record, use for calculation –Else if WIDTHG given on Level continuation record, use for calculation Also check for and, if possible, use WIDTHG0, WIDTHG1, etc. –Else if other partial widths (e.g.,  p or  n ) given on Level continuation record, derive   from  and  i –Else if %IT or %G given on Level continuation record, use for calculation (%IT is currently checked for) Thomas W. Burrows NSDD 2007, St. Petersburg June 11-15, 2007

RULER Upgrades (cont.) –If none of the above are given and T 1/2 on Level record indicates a width (eV, keV, or MeV) or is very short (  sec), do one of the following: Treat as if the  -branching is 100% and do all calculations and creation of new Gamma continuation records. Output a warning that this has been done both in the report file and the terminal output. Treat as if the  -branching is 100% and do all calculations but do not create new Gamma continuation records. Output a warning that this has been done both in the report file and the terminal output. Do not do any calculations and indicate that this has been done both in the report file and the terminal output. Thomas W. Burrows NSDD 2007, St. Petersburg June 11-15, 2007 Preferred

RULER Upgrades (cont.) –If the evaluator has entered the data correctly, this seems to be the best procedure to avoid correlations in the uncertainties (e.g., between  T 1/2 and  %  ). Thomas W. Burrows NSDD 2007, St. Petersburg June 11-15, 2007