Nuclear structure of {sup 170}Tm from neutron-capture and ({ital d},{ital p})-reaction measurements

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.54.78· OSTI ID:286184

Hoff, R W ^[1]; Boerner, H G; Schreckenbach, K; Colvin, G G; Hoyler, F ^[2]; Schauer, W; von Egidy, T; Georgii, R; Ott, J; Schruender, S ^[3]; Casten, R F ^[4]; Gill, R L ^[5]; Balodis, M; Prokofjevs, P; Simonova, L ^[6]; Kern, J ^[7]; Khitrov, V A; Sukhovoj, A M ^[8]; Bersillon, O; Joly, S ^[9] ; Graw, G; Hofer, D; Valnion, B ^[10]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
2. Institut Laue-Langevin, 38042 Grenoble (France)
3. Technical University of Munich, D-85748 Garching (Germany)
4. Yale University, New Haven, Connecticut 06520 (United States)
5. Brookhaven National Laboratory, Upton, New York 11973 (United States)
6. Nuclear Research Center, LV-2169 Salaspils (Latvia)
7. University of Fribourg, CH-1700 Fribourg (Switzerland)
8. Joint Institute of Nuclear Research, Dubna (Russia)
9. Commissariat a l`Energie Atomique, 91680 Bruyeres-le-Chatel (France)
10. University of Munich, D-85748 Garching (Germany)

We have made experimental measurements in {sup 170}Tm of the following: secondary {gamma} rays, conversion electrons, and {gamma}-{gamma} coincidences from thermal neutron capture in {sup 169}Tm, primary {gamma} rays from average resonance capture with 2-keV and 24-keV neutron beams, and proton spectra from the ({ital d},{ital p}) reaction on {sup 169}Tm. From these data and those of previous investigations, we have identified more than 130 excited levels in {sup 170}Tm below 1550 keV. Of these, 62 (with connecting transitions) are placed in 18 rotational bands with assigned Nilsson configurations. These results are in good agreement with a semiempirical modeling of {sup 170}Tm level structure. Values for seven Gallagher-Moszkowski splittings and four Newby shifts have been obtained. These matrix elements show remarkably good agreement with calculation. Among the observed {ital K}{sup {pi}}=1{sup {minus}} and 2{sup {minus}} rotational bands, configuration mixing appears to play a significant role. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Brookhaven National Laboratory
• DOE Contract Number: AC02-76CH00016; FG02-91ER40609; W-7405-ENG-48
• OSTI ID: 286184
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 54; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CAPTURE
COINCIDENCE METHODS
CONVERSION
ELECTRONS
GAMMA RADIATION
GAMMA-GAMMA LOGGING
NEUTRON BEAMS
ROTATIONAL STATES
THERMAL NEUTRONS
THULIUM 169
THULIUM 170