%0 Journal Article %1 ISI:000174548200089 %A Belic, D %A Arlandini, C %A Besserer, J %A de Boer, J %A Carroll, JJ %A Enders, J %A Hartmann, T %A Kappeler, F %A Kaiser, H %A Kneissl, U %A Kolbe, E %A Lnaganke, K %A Loewe, M %A Maier, HJ %A Maser, H %A Mohr, P %A von Neumann-Cosel, P %A Nord, A %A Pitz, HH %A Richer, A %A Schumann, M %A Thielemann, FK %A Volz, S %A Zilges, A %D 2002 %J Phys. Rev. C %K imported myown zilges %N 3 %R 10.1103/PhysRevC.65.035801 %T Photo-induced depopulation of the Ta-180(m) isomer via low-lying intermediate states: Structure and astrophysical implications %V 65 %X The photo-induced depopulation of the quasistable isomer (t(1/2) greater than or equal to1.2 x10(15) yr) in Ta-180 with angular momentum and parity J(pi) = 9(-) at an excitation energy E-x = 75 keV was studied at the new bremsstrahlung irradiation facility installed at the Stuttgart 4.3 MV DYNAMITRON accelerator in the energy range of bremsstrahlung end point energies between E-0 = 0.8-3.1 MeV. The onset of the isomer depopulation could be observed starting at an end point energy of E-0 approximate to1 MeV, i. e., at an intermediate state of Ta-180 at or below that energy. Higher-lying intermediate states were found at 1.22, 1.43, 1.55, 1.85, 2.16, 2.40, 2.64, and 2.80 MeV. The extracted integrated cross sections show a remarkably strong depopulation of the Ta-180(m) isomer by photoexcitation. The results are compared with previous experiments and recent quasiparticle-phonon model calculations. Implications of the results for a possible nucleosynthesis of Ta-180 in the s process and the neutrino process are discussed.

@article{ISI:000174548200089, abstract = {The photo-induced depopulation of the quasistable isomer (t(1/2) greater than or equal to1.2 x10(15) yr) in Ta-180 with angular momentum and parity J(pi) = 9(-) at an excitation energy E-x = 75 keV was studied at the new bremsstrahlung irradiation facility installed at the Stuttgart 4.3 MV DYNAMITRON accelerator in the energy range of bremsstrahlung end point energies between E-0 = 0.8-3.1 MeV. The onset of the isomer depopulation could be observed starting at an end point energy of E-0 approximate to1 MeV, i. e., at an intermediate state of Ta-180 at or below that energy. Higher-lying intermediate states were found at 1.22, 1.43, 1.55, 1.85, 2.16, 2.40, 2.64, and 2.80 MeV. The extracted integrated cross sections show a remarkably strong depopulation of the Ta-180(m) isomer by photoexcitation. The results are compared with previous experiments and recent quasiparticle-phonon model calculations. Implications of the results for a possible nucleosynthesis of Ta-180 in the s process and the neutrino process are discussed.}, added-at = {2019-11-20T10:09:48.000+0100}, article-number = {035801}, author = {Belic, D and Arlandini, C and Besserer, J and de Boer, J and Carroll, JJ and Enders, J and Hartmann, T and Kappeler, F and Kaiser, H and Kneissl, U and Kolbe, E and Lnaganke, K and Loewe, M and Maier, HJ and Maser, H and Mohr, P and von Neumann-Cosel, P and Nord, A and Pitz, HH and Richer, A and Schumann, M and Thielemann, FK and Volz, S and Zilges, A}, biburl = {https://www.bibsonomy.org/bibtex/2749658d6ab5d9274bbf92b3c3184a6b2/ikpcologne}, doi = {10.1103/PhysRevC.65.035801}, eissn = {2469-9993}, interhash = {d27af9c7344bd4be8273752697fbe093}, intrahash = {749658d6ab5d9274bbf92b3c3184a6b2}, issn = {2469-9985}, journal = {Phys. Rev. C}, keywords = {imported myown zilges}, month = MAR, number = 3, orcid-numbers = {Enders, Joachim/0000-0002-8441-378X von Neumann-Cosel, Peter/0000-0002-0256-5940}, researcherid-numbers = {Zilges, Andreas/G-9984-2011 Enders, Joachim/B-5501-2009}, timestamp = {2019-11-20T10:09:48.000+0100}, title = {Photo-induced depopulation of the Ta-180(m) isomer via low-lying intermediate states: Structure and astrophysical implications}, unique-id = {ISI:000174548200089}, volume = 65, year = 2002 }