Levels in Dy¹⁶¹. I. experimental investigation of the decay of Tb¹⁶¹

Journal Article · Sat Mar 01 00:00:00 EST 1958 · Nuclear Physics

DOI:https://doi.org/10.1016/0029-5582(58)90217-7· OSTI ID:4330691

Gregers Hansen, P.; Nathan, O.; Nielsen, O. B.; Sheline, R. K.

The decay of Tb/sup 161/ has been re-investigated by means of scintillation spectrometers, a six-gap BETA -ray spectrometer, amd coincidence techniques. The following transitions were observed (energies in kev): 25.6 (E1), E2), 132 (tentative). Lifetime measurements and coincidence experiments show unambiguously the existence of levels in Dy/sup 161/ with energies of 25.6, 74.5, and 132 kev. A level has tentatively been placed at 103.3 kev. The half lives of the 25.6 and 74.5 kev states are (2.8 plus or minus 0.2) x 10/sup -8/ sec and (3.0 plus or minus 0.3) x 10/sup -9/sec. The BETA spectrum contains a ground state transition with end point at (610 plus or minus 15) kev and groups of (525 plus or minus 15) and (460 plus or minus 15) kev to the 74.5 and 132 kev levels.

• Research Organization: Univ. of Copenhagen
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-011782
• OSTI ID: 4330691
• Journal Information: Nuclear Physics, Vol. 6, Issue C; Other Information: Orig. Receipt Date: 31-DEC-58; ISSN 0029-5582
• Publisher: Elsevier
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

PHYSICS
BETA PARTICLES
BETA SPECTROMETERS
COINCIDENCE METHODS
DECAY
DYSPROSIUM 161
ENERGY LEVELS
GAMMA RADIATION
GAMMA SPECTROMETERS
HALF-LIFE
MEASURED VALUES
MULTIPOLES
NUCLEAR MODELS
SCINTILLATION COUNTERS
SPECTRA
TERBIUM 161
TRANSIENTS