Partial Photoneutron Cross Sections for the Isomeric State {sup 180}Ta{sup m}

Journal Article · Fri May 19 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.192501· OSTI ID:20775246

Goko, S; Utsunomiya, H; Makinaga, A; Kaihori, T; Hohara, S; Akimune, H; Yamagata, T ^[1]; Goriely, S ^[2]; Lui, Y -W ^[3]; Toyokawa, H ^[4]; Koning, A J ^[5]; Hilaire, S ^[6]

---

1. Department of Physics, Konan University, Okamoto 8-9-1, Higashinada, Kobe 658-8501 (Japan)
2. Institute d'Astronomie et d'Astrophysique, Universite Libre de Bruxelles, Campus de la Plaine, CP-226, 1050 Brussels (Belgium)
3. Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)
4. National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568 (Japan)
5. Nuclear Research and Consultancy Group, P.O. Box 25, NL-1755 ZG Petten (Netherlands)
6. Departement de Physique Theorique et Appliquee, Service de Physique Nucleaire, B.P. 12, F-91680 Bruyeres-le-Chatel (France)

Photoneutron cross sections for {sup 181}Ta({gamma},n){sup 180}Ta{sup m} were determined from simultaneous measurements of total cross sections ({sigma}{sup tot}) and ground-state cross sections ({sigma}{sup gs}) for {sup 180}Ta in photodisintegration of {sup 181}Ta with laser Compton-backscattered {gamma} rays. Techniques of direct neutron counting and photoactivation were used for the measurement of {sigma}{sup tot} and {sigma}{sup gs}, respectively. The partial cross sections for the isomeric state serves as a novel probe of the nuclear level density of {sup 180}Ta. Implications for the p- and s-process nucleosynthesis of {sup 180}Ta{sup m} are given.

• OSTI ID: 20775246
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 96; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ENERGY-LEVEL DENSITY
GAMMA RADIATION
GROUND STATES
ISOMERIC TRANSITIONS
NEUTRONS
NUCLEOSYNTHESIS
PHOTONUCLEAR REACTIONS
S PROCESS
TANTALUM 180
TANTALUM 181
TANTALUM 181 TARGET
TOTAL CROSS SECTIONS