Abstract
A new nonradiative decay channel for the anomalously low-lying isomeric level 3/2+ (3.5±1.0 eV) of the 229Th nucleus in a metal via the conduction electrons is examined. The lifetime of the isomer in a metal is calculated. An explanation is given for the experimental results of S. B. Utter et al., Phys. Rev. Lett. 82, 505 (1999), where the optical radiation spectrum of the indicated isomer was investigated.
Similar content being viewed by others
References
C. W. Reich and R. G. Helmer, Phys. Rev. Lett. 64, 271 (1990).
R. G. Helmer and C. W. Reich, Phys. Rev. C 49, 1845 (1994).
V. F. Strizhov and E. V. Tkalya, Zh. Éksp. Teor. Fiz. 99, 697 (1991) [Sov. Phys. JETP 72, 387 (1991)].
E. V. Tkalya, Yad. Fiz. 55, 2881 (1992) [Sov. J. Nucl. Phys. 55, 1661 (1992)].
E. V. Tkalya, V. O. Varlamov, V. V. Lomonosov, and S. A. Nikulin, Phys. Scr. 53, 296 (1996).
A. M. Dykhne, N. V. Eremin, and E. V. Tkalya, JETP Lett. 64, 345 (1996).
A. F. Burenkov, F. F. Komarov, M. A. Kumakhov, and M. M. Temkin, Spatial Distributions of the Energy Released in an Atomic Collision Cascade in Solids [in Russian] (Énergoatomizdat, Moscow, 1985).
A. B. Pippard, Rep. Prog. Phys. 23, 176 (1960).
N. W. Ashcroft and N. D. Mermin, Solid State Physics (Holt, Rinehart and Winston, New York, 1976).
I. M. Band, M. A. Listengarten, M. B. Trzhaskovskaya, and V. I. Fomichev, Preprints LIYaF-289 and LIYaF-298-300, Leningrad Institute of Nuclear Physics, Leningrad (1976–1977).
D. P. Grechukhin and A. A. Soldatov, Preprint IAÉ-2976 [in Russian], Kurchatov Institute of Atomic Energy, Moscow (1998).
A. M. Dykhne and E. V. Tkalya, JETP Lett. 67, 251 (1998).
S. B. Utter, P. Beiersdorfer, A. Barnes et al., Phys. Rev. Lett. 82, 505 (1999).
G. M. Irwin and K. H. Kim, Phys. Rev. Lett. 79, 990 (1997).
D. S. Richardson, D. M. Benton, D. E. Evans et al., Phys. Rev. Lett. 80, 3206 (1998).
Author information
Authors and Affiliations
Additional information
Pis’ma Zh. Éksp. Teor. Fiz. 70, No. 6, 367–370 (25 September 1999)