Alpha decay Alpha Decay Alpha Decay Energy relations

Alpha Decay Energy relations experimental binding energy of 4 He recoil term effect http:

Theory of Alpha decay: Gamow 1928 Coulomb potential Attractive nuclear potential At t=0, alpha

Two potential approach to tunneling (decay width and shift of an isolated quasistationary state)

In the case of the Coulomb barrier, the above integral can be evaluated exactly.

Fine structure in alpha decay 238 Pu centrifugal barrier effect One still has to

Superheavy element alpha decays Phys. Rev. C 87, 054621 (2013)

Superallowed alpha decays 109 Xe → 105 Te→ 101 Sn The inversion of the

Proton emitters daughter Unbound states e. F p quasistationary 1 d 3/2 orbital Qp=1139

Proton emission 7 ms 1/2+ 3 ms 4 ms 7/2 - 145 Tm 141

The landscape of two-proton radioactivity 48 Ni New terra incognita 2 p GSI -

Energy - angle 2 D correlation 45 Fe 3 -body model prediction Experiment

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Alpha decay

Alpha Decay

Alpha Decay Energy relations experimental binding energy of 4 He recoil term effect http: //www. nndc. bnl. gov/chart/re. Color. jsp? new. Color=qa

Theory of Alpha decay: Gamow 1928 Coulomb potential Attractive nuclear potential At t=0, alpha particle is localized inside the nucleus. It can be represented by a wave packet. At large times, the wave function is an outgoing wave.

Two potential approach to tunneling (decay width and shift of an isolated quasistationary state) Phys. Rev. A 38, 1747 (1988); Phys. Rev. A 69, 042705 (2004) Fermi’s golden rule! open closed scattering

In the case of the Coulomb barrier, the above integral can be evaluated exactly. Geiger-Nuttall law of alpha decay 1911 For the Coulomb barrier above, derive the Geiger -Nuttal law. Assume that the energy of an alpha particle is E=Qa, and that the outer turning point is much greater than the potential radius.

Phys. Lett. B 734 203 (2014)

Fine structure in alpha decay 238 Pu centrifugal barrier effect One still has to consider: • alpha-particle formation • angular momentum of alpha particle (centrifugal barrier effect)

Superheavy element alpha decays Phys. Rev. C 87, 054621 (2013)

Superallowed alpha decays 109 Xe → 105 Te→ 101 Sn The inversion of the groundstate spins between 103 Sn and 101 Sn is due to the strong pairing interaction between g 7/2 valence neutrons. Phys. Rev. Lett. 105, 162502 (2010)

Proton emitters daughter Unbound states e. F p quasistationary 1 d 3/2 orbital Qp=1139 ke. V -2 log 10|f(r)| Discrete (bound) states 0 proton -4 147 Tm -6 r 2 -8 -10 r. B 0 20 40 60 80 10 0 12 0 14 0 16 0 18 0 r (fm)

Proton emission 7 ms 1/2+ 3 ms 4 ms 7/2 - 145 Tm 141 Ho ~2% 11/2 - 10% 0. 9% 330 2+ 0+ 202 2+ 0 ke. V 0+ 144 Er 140 Dy 198 ms (10+) 70 ms (5 -) 146 Tm 20, 15% ~1% 480 1. 9 ms (10+) nh 11/2 x 2+ 250 nh 11/2 180 ns 1/2 x 0 ke. V ns 1/2 145 Er 2+ 144 Tm ~30% 270+x nh 11/2 x 2+ nh 11/2 x 0 ke. V ns 1/2 143 Er

The landscape of two-proton radioactivity 48 Ni New terra incognita 2 p GSI - FRS 31 Ar b 3 p ISOLDE 6 He �a + d simultaneous NSCL sequential E. Olsen et al, PRL 111, 139903 (2013); E: PRL 111, 139903 (2013)

Energy - angle 2 D correlation 45 Fe 3 -body model prediction Experiment