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Hintz, Norton M.; Franey, M. A.; Gazzaly, M.; Cook, David A.; Kyle, G. S.; Dehnhard, D.; Seestrom-Morris, S. J.; Hoffmann, G. W.; Barlett, Martin L; Blanpied, G. S.; McGill, J.; McClelland, J. B.; Boudrie, R. L.; Irom, F.; Pauletta, G.

doi:10.1103/physrevc.30.1976

Phys. Rev. C

1984

DOI: 10.1103/physrevc.30.1976

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High spin states inSi28andNi

Norton M. Hintz

M. A. Franey

M. Gazzaly

et al.

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Cited by 20 publications

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“…Our data (from TRIUMF) was normalized so that our 300 MeV cross sections agree with (p,pf) data (multiplied by 2) at 333 MeV in Ref. 9. In fig.…”

mentioning

confidence: 99%

Energy dependence of stretched states excited in (p,n) reactions

et al. 1991

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We studied excitation of "stretchedn particle-hole states in (p ,n) reactions at 100, 200, 300, and 400 MeV. This project utilized the beam-swinger (p,n) facility1 at the IUCF for measurements at 100 and 200 MeV and the new "Chargex" (p,n) facility2 at TRIUMF for measurements at 200, 300, and 400 MeV.In stretched state, the particle and the hole are both in "stretched" orbits (j, = l p + i ; j h = lh + i) and their angular momenta are coupled to the maximum possible J = l, + eh + 1. Such states have quite large spins and are unique within 2 hw of excitation so that there is relatively little mixing with other particle-hole configurations. For isovector nucleon inelastic scattering processes such as the (p,n) reaction at large momentum transfers (1 to 2 fm-l) where high-spin stretched states are excited, the dominant term in the effective nucleon-nucleon interaction driving the reaction is the isovector-tensor term tT,. Because isovector stretched states have a single dominant lp-lh configuration and are excited primarily by a single term in the nucleon effective interaction, they should in principle provide a powerful tool for studying both the reaction mechanism and nuclear structure.For the present project, we have chosen to study the energy dependence of the excitation of the J" = 6-(T f7/2, vd~;~) state excited in the 2 8~i ( p , n ) 2 8~ (4.95 MeV) reaction and the J" = 9f (rg912,vg&) state excited in the 8 8~r ( p , n ) 8 8~( 1 . 4 8 MeV) reaction. The former is a ''1 hw" excitation with the (proton) particle and the (neutron) hole in different orbits; analogs of this reaction were seen in (p,pf)3, (e,ef)4 and (T, a')' reactions, as well as in the (n,p) reaction. the latter reaction is a "0 hw" excitation with the particle and hole in the same orbit; because of the Pauli principle, the only inelastic scattering process that can excite such states is an isospin-lowering, charge-exchange, reaction on a nucleus with a neutron excess. Such 0 hw stretched states are seen quite commonly6s7 in medium-energy (p,n) reactions on medium-mass and heavy nuclei, but they have no analogs in (p,pf) and (e,el) reactions. As noted by Anderson, et al. in Ref. 7, 0 hw stretched states have normal-

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“…Our data (from TRIUMF) was normalized so that our 300 MeV cross sections agree with (p,pf) data (multiplied by 2) at 333 MeV in Ref. 9. In fig.…”

mentioning

confidence: 99%

Energy dependence of stretched states excited in (p,n) reactions

et al. 1991

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Matter under extreme conditions

1993

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Nuclear Data Sheets for A = 58

Nesaraja

Geraedts

Singh

2010

Nuclear Data Sheets

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High spin states inSi28andNi

Cited by 20 publications

References 38 publications

Energy dependence of stretched states excited in (p,n) reactions

Energy dependence of stretched states excited in (p,n) reactions

Matter under extreme conditions

Nuclear Data Sheets for A = 58

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