Search for excited states in {sup 7}He with the (d,p) reaction

Journal Article · Thu Dec 15 00:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.061301· OSTI ID:20771066

Wuosmaa, A H ^[1]; Rehm, K E; Greene, J P; Henderson, D J; Janssens, R V.F.; Jiang, C L; Moore, E F; Pardo, R C; Peterson, D; Pieper, Steven C; Savard, G; Schiffer, J P; Sinha, S; Tang, X; Wiringa, R B ^[2]; Jisonna, L; Segel, R E ^[3]; Paul, M ^[4]

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1. Physics Department, Western Michigan University, Kalamazoo, Michigan 49008-5252 (United States)
2. Physics Division, Argonne National Laboratory, 9700 S. Cass Ave, Argonne Illinois 60439 (United States)
3. Physics Department, Northwestern University, Evanston, Illinois 60208 (United States)
4. Hebrew University, Jerusalem, 91904 (Israel)

We have studied the properties of low-lying levels in {sup 7}He using the {sup 2}H({sup 6}He,p){sup 7}He reaction at 11.5 MeV/u. This reaction probes the {sup 6}He{sub g.s.}+n character of states in {sup 7}He. The ground state was populated with a spectroscopic factor comparable to that obtained from ab initio calculations, supporting the tentative spin-parity assignment of 3/2{sup -} in the literature. In addition to the ground state, a broad structure is observed between E{sub X}=2-3 MeV, the excitation-energy range expected for the 1/2{sup -} state in {sup 7}He. No evidence was found for a lower-lying, first-excited state reported recently.

• OSTI ID: 20771066
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 72, Issue 6; Other Information: DOI: 10.1103/PhysRevC.72.061301; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DEUTERIUM TARGET
DEUTERONS
EXCITATION
EXCITED STATES
GROUND STATES
HELIUM 6 REACTIONS
HELIUM 7
MEV RANGE
PARITY
SPECTROSCOPIC FACTORS
SPIN