Nuclear data sheets for A = 153

Journal Article · Sun Jul 01 04:00:00 EDT 1973 · Nucl. Data Sheets, v. 10, no. 5, pp. 429-513

DOI:https://doi.org/10.1016/S0090-3752(73)80010-9· OSTI ID:4330502

Kroger, L. A. ^[1]; Reich, C. W. ^[1]

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1. Aerojet Nuclear Company National Reactor Testing Station Idaho Falls, Idaho 83401, USA

A comptlation of experimental data on nuclides with mass number A = 153 is presented. The compilation constitutes an updating of the previous A = 153 data compilation, which appeared in the Nuclear Data Sheets in November 1963. The cutoff date for the data included in this compilation is approximately June 1, 1972. Data are included for 9 nuclides, /sup 153/Pm(Z = 51) through /sup 153/Tm(Z = 69). Direct measurements of the ground-state spins now exist for the Z = 62 through Z = 66 members of this Achain. Changed from the 1963 version are the ground-state parity assignments for /sup 153/Sm and /sup 153/Gd, given here as pi = + for /sup 153/Sm and pi = - for /sup 153/Gd. The availability of data from highresolution neutron-capture gamma -ray spectroscopy, single-nucleontransfer reactions, and ( alpha ,xn) reactions since the last compilation has provided a much more complete picture of the energylevel structure of these nuclei. Based on the present data, there is evidence for well-developed rotational-band structure in /sup 153/Sm and /sup 153/Eu. level systematics are treated in terms of the Nilsson model including various well-established couplings. While well-developed rotational-band structure is also observed in /sup 153/Gd, suggesting the existence of a deformed equilibrium shape, attempts to make configuration assignments to some of the lower-lying states in terms of a deformed-nucleus coupling scheme have encountered serious difficulties. In addition, it has not yet been possible to provide an interpretation of all the currently available data on the energy levels above approximately 0.4 MeV in /sup 153/ in terms of the expected single-particle and vibrational configurations. An attempt was made to provide absolute BETA - and gamma -branching ratios on the decay,scheme drawingn. In /sup 153/Sm BETA decay, where two essentially independent types of measurements for determining BETA -branching ratios exist and give consistent results, the BETA - and gamma - branching ratios are considered Well established. In the BETA decay of /sup 153/Pm and the epsilon decay of /sup 153/ Gd, /sup 153/Tb and /sup 153/Dy, it has been necessary to rely on indirect means to estimate branching ratios. The methods employed to do this are discussed in connection with the specific nuclides. (auth)

• Research Organization: Aerojet Nuclear Company National Reactor Testing Station Idaho Falls, Idaho 83401, USA
• Sponsoring Organization: USDOE SC Office of Nuclear Physics (SC-26)
• NSA Number: NSA-29-017273
• OSTI ID: 4330502
• Journal Information: Nucl. Data Sheets, v. 10, no. 5, pp. 429-513, Journal Name: Nucl. Data Sheets, v. 10, no. 5, pp. 429-513 Vol. 10; ISSN NDSBA
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DATA DYSPROSIUM 153-- ERBIUM 153-- HOLMIUM 153-- PROMETHIUM 153-- THULIUM 153
ENERGY LEVELS-- EUROPIUM 153-- GADOLINIUM 153-- SAMARIUM 153-- TERBIUM 153
NNDC
THULIUM 153