Spectroscopy of open systems: proton emitters

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Kurchatov Institute, Moscow

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Presentation transcript:

Spectroscopy of open systems: proton emitters Non-adiabatic theory: B.Barmore et al., Phys.Rev. C62, 054315 (2000) A.T. Kruppa and WN, Phys. Rev. C69, 054311 (2004)

2-proton radioactivity of 45Fe N=Z 1-proton emission: -120 keV < Sp < 70 keV t1/2 > 100s 1-proton emission: -120 keV < Sp < 70 keV t1/2 > 100s 2-proton emission: -1000 keV < S2p < -1300 keV t1/2~10-6s – 1s sequential simultanious proposed by V.I. Goldansky; Nucl.Phys. 19 (1960), 482 Nucl.Phys. 27 (1961), 648 discovered by M.Pfützner et al., EPJA 14 (2002) 279

2-proton radioactivity of 45Fe Tunneling through a potential barrier: S spectroscopic factor for 2-proton creation ω frequency, with which both protons hit the barrier P is the penetrability, the probability for a tunneling process proposed by V.I. Goldansky; Nucl.Phys. 19 (1960), 482 Nucl.Phys. 27 (1961), 648 discovered by M.Pfützner et al., EPJA 14 (2002) 279

2-proton radioactivity of 45Fe Monte Carlo simulation (200 events) of the opening angles between both protons for the 45Fe decay L. Grigorenko et al. Phys. Rev. Lett. 85 (2000), 22, Nucl.Phys. A714 (2003), 425

Optical time projection chamber 45Fe p G. Charpak et al., NIM A269 (1988), 142

Optical time projection chamber K. Miernik et al., Phys.Rev.Lett. 99 (2007) 192501

2-proton radioactivity of 45Fe K. Miernik et al., Phys.Rev.Lett. 99 (2007) 192501

2-proton radioactivity of 45Fe Q2p=1.15±0.09 MeV und T1/2 consistent with 2p-emission (sensitive between 1µs and 10 ms) K. Miernik et al., Phys.Rev.Lett. 99 (2007) 192501