Spin determination of valence and inner hole states via the [sup 208]Pb([ital [rvec d]],[ital t])[sup 207]Pb reaction at [ital E][sub [ital d]]=200 MeV

Journal Article · Thu Apr 01 00:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.1571· OSTI ID:6643476

Langevin-Joliot, H; van de Wiele, J; Guillot, J; Gerlic, E; Rosier, L H; Willis, A; Morlet, M; Duhamel-Chretien, G; Tomasi-Gustafsson, E; Blasi, N; Micheletti, S; van der Werf, S Y ^[1]

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1. Institut de Physique Nucleaire, Institut National de Physique Nucleaire et de Physique des Particules, Centre National de la Recherche Scientifique, Boite Postale No. 1, 91406 Orsay (France) Institut des Sciences Nucleaires, Institut National de Physique Nucleaire et de Physique des Particules, Centre National de la Recherche Scientifique, 53 avenue des Martyrs, 38026 Grenoble (France) Institut de Physique Nucleaire, Institut National de Physique Nucleaire et de Physique des Particules, Centre National de la Recherche Scientifique, 43 boulevard du 11 Novembre, 69622 Lyon, Villeurbanne (France) Laboratoire National Saturne, Centre d'Etudes Nucleaires Saclay, F-91191, Gif-sur-Yvette CEDEX (France) Istituto Nazionale di Fisica Nucleare and University of Milan, Physics Department, via Celoria 16, 2

Highly excited neutron hole states in [sup 207]Pb have been studied via the ([ital [rvec d]],[ital t]) reaction at [ital E][sub [ital d]]=200 MeV using for the first time a polarized beam, with both vector and tensor components. The determination of overlapping neutron hole response functions takes advantage of the strong characteristic features of [ital j][sub [minus]]=[ital l][minus]1/2 versus [ital j][sub +]=[ital l]+1/2 level analyzing powers and of the good distorted wave Born approximation (DWBA) description of the reaction. A least-squares fit analysis of the [sigma], [ital A][sub [ital y]], and [ital A][sub [ital y][ital y]] angular distributions has allowed a determination of the high [ital j] transition spectroscopic factors contributing to the excitation energy bins up to [ital E][sub [ital x]]=14.5 MeV. The results are compared in details with those relying only on [ital l] identification, previously obtained in the 1[ital i][sub 13/2] and 1[ital h][sub 9/2] valence state fragmentation up to [ital E][sub [ital x]]=6.7 MeV and on the 1[ital h][sub 11/2] strength up to [similar to]10 MeV. Several previous conclusions are unambiguously confirmed, in particular, the attribution of the bump around [ital E][sub [ital x]]=8.2 MeV to the 1[ital h][sub 11/2] strength. In addition, the present experiment settles the attributions of several [ital j][sub [minus]] versus [ital j][sub +] valence groups and indicates that the 1[ital h][sub 9/2] strength is spread up to [similar to]10.8 MeV.

• OSTI ID: 6643476
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 47:4; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DEUTERON REACTIONS
PICKUP REACTIONS
LEAD 208 TARGET
SINGLE-PARTICLE MODES
ANALYZING POWER
DWBA
HOLES
LEAD 207
MEV RANGE 100-1000
POLARIZED BEAMS
SHELL MODELS
SPIN
TRITONS
ANGULAR MOMENTUM
BEAMS
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DIRECT REACTIONS
ENERGY RANGE
EVEN-ODD NUCLEI
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEAD ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MILLISEC LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
OSCILLATION MODES
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS
663440* - D-
T-
& He-induced Reactions & Scattering- (1992-)
663580 - Nuclear Mass Ranges- A=190-219- (1992-)