Impact of the electron environment on the lifetime of the {sup 229}Th{sup m} low-lying isomer

Journal Article · Thu Nov 15 00:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.054313· OSTI ID:21067894

Karpeshin, F F ^[1]; Trzhaskovskaya, M B ^[2]

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1. Institute of Physics, St. Petersburg State University, St. Petersburg (Russian Federation)
2. Petersburg Nuclear Physics Institute, Gatchina (Russian Federation)

The question of the lifetime of the {sup 229}Th{sup m} low-lying isomer is considered in light of current experimental research. A strong effect of the electron shell on lifetime is demonstrated, depending on the energy of the isomer. Calculations are performed within the framework of the multiconfiguration Dirac-Fock method. The calculated lifetime ranges from around 1 min down to 10{sup -5} s. Prospects for further experimental research of the isomer are discussed.

• OSTI ID: 21067894
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 76, Issue 5; Other Information: DOI: 10.1103/PhysRevC.76.054313; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ELECTRONS
HARTREE-FOCK METHOD
ISOMERIC NUCLEI
LIFETIME
THORIUM 229