1. Light Radioactive Beam Production via Two Stage Irradiation Setup
Tsviki Hirsh
Soreq NRC, Yavne 81800, Israel
Weizmann Institute of Science, Rehovot, Israel
PANIC conf

2. Outline 1 2 3 4 5 The physics case for intense light RIB.
Technologies for intense low energy deuterons beam driver. 3
The two stage production method and simulations. 4
(n,) production preliminary results. 5
Future planned experiments.

3. High Yield Production of 6He and 8Li
Objectives
RNB
High Yield Production of 6He and 8Li

4. Astrophysics and Nuclear Physics with Light RIB
4He(8Li,n)11B reaction
Ishiyama et al., Physics Letters B 640 (2006) 82–85
Terasawa et al. , Astrophysical J., 562: , 2001 November 20

5. Beta Beam 9Be(n,α)6He 11B(n,α)8Li 6He  β- t0.5= 807 ms
8Li  β- t0.5= 838 ms
11B(n,α)8Li
130 km
65m
65m
65m
d Linac
Double Target
P.Delahaye, “The beta-beam project in the EURISOL context”,Quantum Seminar, Mainz (2006)

6. Marek Lewitowicz, SPIRAL 2 Week, Nov (2007)
SPIRAL 2 - GANIL
Marek Lewitowicz, SPIRAL 2 Week, Nov (2007)

7. SARAF - Soreq 2008 deuterons / protons linear accelerator
5 MeV at Phase 1
with only 1 SM (2008)
40 MeV at Phase 2
with 6 SMs (2013)
2 mA current
6 SMs
βo=0.15
βo=0.09
RFQ
Nagler, LINAC2008
Piel, EPAC2008
Pekeler, LINAC2006
2008

8. Other possible converters: Beryllium, Water, Heavy water
Neutrons Spectrum of a 40 MeV Deuterons Beam on a Thick Lithium Target
40 MeV , 250 mA Lithium Converter
40 MeV , 5 mA Carbon Converter
SARAF
40 MeV , 2 mA Lithium Converter
Other possible converters:
Beryllium, Water, Heavy water
M.Hagiwara et al. Fus. Sci. Tech., 48 (2005).

9. Optimization Calculations
MCNPTM Monte Carlo N-Particle transport code
Expected Yields for a BeO target:
SARAF (40 MeV, 2 mA): 8∙1012 [6He/sec]
SPIRAL2 (40 MeV, 5 mA): 2∙1013 [6He/sec]
Expected Yields for a BN target:
SARAF (40 MeV, 2 mA): 2∙1012 [8Li/sec]
Hass et al., J. Phys. G: Nucl. Part. Phys., 35, (2008).

10. 2D Slice Inside The Secondary Target
Simulations:
2D Slice Inside The Secondary Target

11. Simulations: 6He Production Inside a 2D Slice of the target
Cone shaped target
* RT stands for the distance between the two targets

12. Oxide Fibers BeO 2 mm disks 23 mm diameter Purity of 99.9% BeO
~500 ppm impurities
50%-75% density
Grain size 20 micron
TiO2
ZrO2
U. Koster, “Oxide Fiber Targets at ISOLDE” ,Nuc. Ins. Meth. Phys. Res. B 204 (2003)

13. Present and Future ExperimentsNG
27Al(n,α)24Na
Production γ
27Al(n,α)24Na
Monte Carlo
Simulations
NG /
Phase 1
11BN(n,α)8Li
Production
extraction β
11BN(n,α)8Li
Monte Carlo
Simulations
Phase 1 /
Ganil /
ISOLDE
9BeO(n,α)6He
Production
extraction β
9BeO(n,α)6He
Monte Carlo
Simulations
Aluminum cubes irradiation experiment number Preliminary experiment for verification of target geometry in compare to Monte Carlo simulations.
Aluminum cubes irradiation experiment number Preliminary experiment for verification of target + reflector geometries in compare to Monte Carlo simulations and previous experiment.
6He production
and extraction
numbers

14. Aluminum Cubes Experiment
1.4∙109 n/s
T.Y.Hirsh et al. PoS(NUFACT08)090, 2008.

15. 8Li Production Experiment
8Li production measurement.
11BN(n,)8Li by fast neutrons.
Automatic measurement system using a fast air-pressure rabbit.
Detection of betas from 8Li decay.
A benchmark for simulations.
6He production is also possible by replacing the target by BeO.
measurement
irradiation
3 sec
0.1 sec
time
movement

16. SARAF Phase I 2009 5.2 MeV and 2 mA deuterons beam.
LiLiT
2009 BD
D-Plate
5.2 MeV and 2 mA deuterons beam.
Production of fast neutrons by placing a light isotopic target with high positive Q-value (probably Al/BN/Li or 13C).
We are planning to repeat the experiments of Aluminum and BN irradiation by using these neutrons
PSM
EIS
RFQ
LEBT

17. Option for experiment at GANIL:
Proposed ISOLDE Porous BeO Experiment
Option for experiment at GANIL:
Production and extraction of 8Li
Boron-Nitride powder target
Fast neutrons from 12C(12C,n) reactions

18. Summary
Presented simulations and tests for production of secondary-fast neutron induced RIB production.
Planned future experiments – including extraction and ionization yields.
Towards a specific design of a target for SPIRAL2 and/or SARAF.
Driver accelerator parameters (current and energy) are NOT yet optimized for beta-beam purposes (e.g., 8Li, 18Ne) – to be addressed.

19. Acknowledgments Michael Hass Vivek Kumar Kuljeet Singh Dan Berkovits
Leo Weissman
Yoram Nir-El
Francois de Oliveira
Marek Lewitowicz
Mats Lindroos
Theirry Stora