FORBIDDEN TRANSITIONS IN THE DEFORMED Tm$sup 169$ NUCLEUS

Journal Article · Sun Nov 01 04:00:00 EST 1959 · Zhur Eksptl'. i Teoret. Fiz.

OSTI ID:4178508

Berlovich, E E; Klement'ev, V N; Fleisher, V G; Larionov, O V; Murtazin, F Sh; Apostolev, D A

Lifetime values of (3.6 plus or minus 0.1) x 10/sup -6/ sec and (6.7 plus or minus 0.2) x 10/sup -7/ sec were obtained by delayed coincidence measurements for the 379 kev and 316 kev levels of the Tm/sup 169/ nucleus. The partial probabilities for eight transitions were determined on the basis of these data and those on the relative transition intensities from both levels and the multipolarity ratios. For the 177 (E2), 177 (M1), 198 (E2), 198 (M1), 308 (E2), 240 (E1), and 260 kev (E1) transitions which are forbidden with respect to the projection of the total angular momentum on the deformation axis, the delay factor comprises 10/sup 3/ to 10/sup 4/ per unit forbiddenness, a value which differs significantly from the usual value (10 to 100). The 63 kev (E1) transition which is forbidden with respect to the projections of the orbital and spin momenta and also with respect to the quantum number characterizing oscillations along the deformation axis is less probable by five orders of magnitude than that predicted by Weisskopf's estimation. However it is in good qualitative agreement wlth Nilsson's calculation of the probability for deformed nuclei. (auth)

• Research Organization: Leningrad Inst. of Physics and Tech.
• NSA Number: NSA-14-007002
• OSTI ID: 4178508
• Journal Information: Zhur Eksptl'. i Teoret. Fiz., Journal Name: Zhur Eksptl'. i Teoret. Fiz. Vol. Vol: 37
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ANGULAR MOMENTUM
COINCIDENCE METHODS
DECAY
DEFORMATION
DIPOLES
ELECTRIC MOMENTS
ENERGY
ENERGY LEVELS
HALF-LIFE
MAGNETIC MOMENTS
MEASURED VALUES
MOMENTUM
NUCLEAR MODELS
NUCLEI
OSCILLATIONS
PHYSICS
QUADRUPOLES
SPIN
THULIUM 169