Lifetime measurements in the regular [Delta][ital I]=1 oblate band in [sup 197]Pb

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.48.R2135· OSTI ID:5929768

Hughes, J R; Becker, J A; Brinkman, M J; Henry, E A; Hoff, R W; Stoyer, M A; Wang, T F ^[1]; Cederwall, B; Deleplanque, M A; Diamond, R M; Fallon, P; Lee, I Y; Oliveira, J R.B.; Stephens, F S ^[2]; Cizewski, J A; Bernstein, L A ^[3]; Draper, J E; Duyar, C; Rubel, E ^[4]; Kelly, W H ; Vo, D ^[5]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
2. Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
3. Rutgers University, New Brunswick, New Jersey 08903 (United States)
4. Physics Department, University of California, Davis, California 95616 (United States)
5. Iowa State University, Ames, Iowa 50010 (United States)

Lifetimes of states in the regular [Delta][ital I]=1 band in [sup 197]Pb have been measured with the Doppler-shift attenuation method. Excited states in [sup 197]Pb were populated using the [sup 154]Sm([sup 48]Ca, 5[ital n]) reaction at [ital E][sub [ital b]]=210 MeV. The target consisted of 1 mg/cm[sup 2] 54Sm evaporated onto a 10 mg/cm[sup 2] Au backing. Discernible lineshapes for [gamma] rays in the energy range 300[lt][ital E][sub [gamma]][lt]500 keV in the regular band were observed in a spectroscopic study with the 20 Ge-detector array, HERA. Level lifetimes were obtained from a lineshape analysis. Averaged reduced transition strengths, [ital B]([ital M]1)[similar to]1.7 W.u. and [ital B]([ital E]2)[similar to]18 W.u., are deduced and these are compared with theoretical predictions for the suggested configuration of this band.

• DOE Contract Number: W-7405-ENG-48; AC03-76SF00098; FG02-92ER40692; FG02-87ER40371
• OSTI ID: 5929768
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 48:5; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

663110* -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663450 -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663580 -- Nuclear Mass Ranges-- A=190-219-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BETA DECAY RADIOISOTOPES
CALCIUM 48 REACTIONS
CHARGED-PARTICLE REACTIONS
COLLECTIVE EXCITATIONS
E2-TRANSITIONS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXCITATION
EXCITED STATES
FERMIONS
HADRONS
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEAD 197
LEAD ISOTOPES
LIFETIME
M1-TRANSITIONS
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
RADIOISOTOPES
SAMARIUM 154 TARGET
SPECTRA
TARGETS