TITLE

Photoactivation of [sup 180]Ta[sup m]: Does it affect s-process nucleosynthesis of nature’s rarest stable isotope?

AUTHOR(S)
von Neumann-Cosel, P.; Arlandini, C.; Belic, D.; Besserer, J.; de Boer, J.; Carroll, J. J.; Enders, J.; Hartmann, T.; Ka¨ppeler, F.; Kaiser, H.; Kneissl, U.; Loewe, M.; Maier, H. J.; Maser, H.; Mohr, P.; Nord, A.; Pitz, H. H.; Richter, A.; Schumann, M.; Volz, S.
PUB. DATE
July 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 529 Issue 1, p681
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The depopulation of the quasistable isomer (J[sup π]=9[sup -], E[sub x]=75 keV) in [sup 180]Ta through resonant photoabsorption was studied with intense bremsstrahlung. The results show evidence for a deexciting level with an energy of 1.085 MeV or below, leading to a dramatic acceleration of the isomer decay to the short-lived J[sup π]=1[sup +] ground state under stellar s-process conditions. Consequences for a possible nucleosynthesis of nature’s rarest isotope [sup 180]Ta within the s process are discussed. © 2000 American Institute of Physics.
ACCESSION #
6029931

 

Related Articles

  • Gamma Deexcitation of the [sup 180m]Ta Isomer. Soloviev, V. G.; Sushkov, A. V.; Shirikova, N. Yu. // Physics of Atomic Nuclei;Jul2001, Vol. 64 Issue 7, p1199 

    Vibrational states built on the K[sup π] = 9[sup -] isomer and on the ground state (K[sup π] = 1[sup +]) in [sup 180]Ta are calculated within the quasiparticle-phonon nuclear model using the [sup 178]Hf nucleus as a core. A procedure for calculating the rates of K-allowed γ-ray...

  • β--DELAYED AND ISOMER SPECTROSCOPY OF NEUTRON-RICH Ta AND W ISOTOPES. ALKHOMASHI, N.; REGAN, P. H.; PODOLYÁK, ZS.; PIETRI, S. B.; GARNSWORTHY, A. B.; STEER, S. J.; BENLLIURE, J.; CASEREJOS, E.; GÓRSKA, M.; GERL, J.; WOLLERSHEIM, H. J.; GREBOSZ, J.; KURZ, N.; KOJOUHAROV, I.; SCHAFFNER, H.; ALGORA, A.; BENZONI, G.; BLAZHEV, A.; BOUTACHKOV, P.; BRUCE, A. M. // Acta Physica Polonica B;2009, Vol. 40 Issue 3, p875 

    Decays of neutron-rich A ~ 190 nuclei have been studied following projectile fragmentation of a 208Pb beam on a 9Be target at the GSI Fragment Separator. Gamma-ray decays from previously reported isomeric states in 188Ta, 190W and 192,193Re were used as internal calibrations for the particle...

  • Metal-doped magic clusters of Si, Ge, and Sn: The finding of a magnetic superatom. Kumar, Vijay; Kawazoe, Yoshiyuki // Applied Physics Letters;9/29/2003, Vol. 83 Issue 13, p2677 

    Studies on divalent-metal (M)-atom-doped X[sub N]M (X=Si, Ge, and Sn, N=8–12 and 14) clusters, using ab initio pseudopotential plane wave method, show that the well known nine- and ten-atom capped prism units as well as 12- and 14-atom clusters of these elements can transform to magic...

  • A combined crossed beam and ab initio investigation on the reaction of carbon species with C[sub 4]H[sub 6] isomers. III. 1,2-butadiene, H[sub 2]CCCH(CH[sub 3]) (X [sup 1]A[sup ′])—a non-Rice–Ramsperger–Kassel–Mar... Balucani, N.; Lee, H. Y.; Mebel, A. M.; Lee, Y. T.; Kaiser, R. I. // Journal of Chemical Physics;9/15/2001, Vol. 115 Issue 11 

    Crossed molecular beam experiments were conducted to investigate the reaction of ground state carbon atoms, C([sup 3]P[sub j]), with 1,2-butadiene, H[sub 2]CCCH(CH[sub 3]) (X [sup 1]A[sup ′]), at three collision energies of 20.4 kJ mol-1, 37.9 kJ mol-1, and 48.6 kJ mol-1. Ab initio...

  • Oscillatory Radioactive Decay of Long-Lived Isomers with Intermediate M�ssbauer Levels. Godovikov, S. K. // JETP Letters;5/25/2002, Vol. 75 Issue 10, p499 

    Oscillations were observed in the radioactive decay curves of the [sup 119][sup m]Sn and [sup 125][sup m]Te isomers. The phenomenological model based on a nonlinear decay equation is suggested for the phenomenon. � 2002 MAIK �Nauka / Interperiodica�.

  • Biological Monitoring of Low Level Occupational Xylene Exposure and the Role of Recent Exposure. G.A. Jacobson; S. McLEAN // Annals of Occupational Hygiene;Jun2003, Vol. 47 Issue 4, p331 

    The correlation between low level time-weighted average (TWA) atmospheric xylene exposure (p.p.m.) and urinary methylhippuric acid (MHA) expressed per gram of creatinine was examined. Subjects were recruited from workplaces that utilized xylene. Ambient monitoring of o-, m- and p-xylene isomers...

  • Structure and mechanism of formation of the H-y5 isomer of an intramolecular DNA triple helix. van Dongen, Maria J.P.; Doreleijers, Jurgen F.; van der Marel, Gijs A.; van Boom, Jacques H.; Hilbers, Cornelis W.; Wijmenga, Sybren S. // Nature Structural Biology;Sep99, Vol. 6 Issue 9, p854 

    H-DNA, thought to play a regulatory role in transcription, exists in two isomeric forms, H-y3 and H-y5. We present the first solution structure of a DNA fragment representing the H-y5 fold. The structure shows the H-y5 triple helix, and for the first time how in an H-DNA isomer the purine strand...

  • The structures and vibrational frequencies of the NNO analogs NPO and PNO and their protonated forms. Davy, Randall D.; Schaefer, Henry F. // Journal of Chemical Physics;5/1/1990, Vol. 92 Issue 9, p5417 

    The surprising relative stability of PNO compared to NPO cannot be explained by a single configuration molecular orbital (MO) model. However the MO model can be used to understand the pattern of stability among the protonated isomers HPNO+, PNOH+, HNPO+, and NPOH+, and perhaps to explain...

  • Photon detection with n-propanol and C[sub 2]H[sub 6]O isomers. Lipton-Duffin, J. A.; Mark, A. G.; McLean, A. B. // Review of Scientific Instruments;Sep2002, Vol. 73 Issue 9, p3149 

    We demonstrate that a Geiger-Müller-type bandpass photon detector, suitable for inverse photoemission experiments, can be constructed from a MgF[sub 2] entrance window that has a high-energy transmission threshold of 10.97 eV, and ethanol, a detection gas with an ionization potential of 10.48...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics