Ground-state Gamow-Teller strength in sup 64 Ni( n , p ) sup 64 Co cross sections at 90--240 MeV

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.44.2794· OSTI ID:5081934

Ling, A; Aslanoglou, X; Brady, F P; Finlay, R W; Haight, R C; Howell, C R; King, N S.P.; Lisowski, P W; Park, B K; Rapaport, J; Romero, J L; Sorenson, D S; Tornow, W; Ullmann, J L ^[1]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States) Ohio University, Athens, Ohio 45701 (United States) University of California, Davis, California 95616 (United States) Duke University and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27706 (United States)

Cross sections have been measured for the reaction {sup 64}Ni({ital n},{ital p}){sup 64}Co at laboratory angles between 0{degree} and 10{degree} for incident neutron energies from 90 to 240 MeV. The ground-state cross sections together with the {beta}{sup {minus}} decay {ital ft} value for the transition {sup 64}Co(g.s.){r arrow}{sup 64}Ni(g.s.) are used to normalize the {ital q}=0 differential cross section in units of mb/sr per unit Gamow-Teller (GT) strength. This is the first absolute measurement of the {ital A}({ital n},{ital p}) unit cross section for a nucleus in the ({ital fp}) shell, and it may be used to calibrate the GT strength measured in other ({ital n},{ital p}) reactions of similar mass nuclei. Since the ({ital e}{sup {minus}},{nu}{sub {ital e}}) channel involves the same nuclear matrix element as the ({ital n},{ital p}) channel, knowledge of GT strength in these nuclei is important for supernova modeling codes which depend on knowledge of {ital e}{sup {minus}} capture rates of ({ital fp})-shell nuclei to determine parameters of stellar core collapse.

• DOE Contract Number: W-7405-ENG-36; AC05-76ER01067
• OSTI ID: 5081934
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 44:6; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)
663550 -- Nuclear Mass Ranges-- A=59-89-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CHARGE-EXCHANGE REACTIONS
CROSS SECTIONS
ENERGY LEVELS
ENERGY RANGE
ERUPTIVE VARIABLE STARS
GAMOW BARRIER
GAMOW-TELLER RULES
GROUND STATES
HADRON REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NEUTRON REACTIONS
NICKEL 64 TARGET
NUCLEAR REACTIONS
NUCLEON REACTIONS
STAR MODELS
STARS
SUPERNOVAE
TARGETS
V-A THEORY
VARIABLE STARS