Gamma-Ray Branching inSr89

Abstract

We wish to emphasize, however, that the aim of this work is not to argue the equality or inequality of the size of the neutron and proton distributions in nuclei but to show that, if one assumes their identity, then a special class of nuclear forces with long range attractions the effective interaction potential decreases at high energy in proportion to (l-v 2 /c 2 )$ = M/E if the interaction results from a (pseudo) scalar field. This is in contrast with the electromagnetic interaction in which the so-called "scalar potential'' is the time component of a Lorentz four-vector and in which the above factor does not appear. This effect seems capable of qualitatively accounting for Williams' results if the large nuclear radius at low energies is interpreted as a consequence of the nuclear force attractions.The decay of strontium-89 has been found to proceed through Y 89w to the extent of 0.02%.

Gamma-ray decay schemes for ⁸⁹Kr and ⁸⁹Rb

“…The 9/2+ isomeric l e v e l i n 8 9~ a t 909 keV i s known t o have an ~4 t r a n s i t i o n t o t h e ground s t a t e (62,63). A second f o r b i d d e n beta t r a n s i t i o n between the "Sr ground s t a t e and the 9/2+ s t a t e i n 8 9~ has + been observed (43,44) …”

Gamma-ray decay schemes for 89Kr and 89Rb

“…The 9/2 isomeric level in Y at IteV is known to have an M4 transition to the ground state (62,63). A second forbidden beta transition between the ®^Sr ground state and the 9/2* state in has been observed (43,44), which is consistent with a 5/2* assignment to the ®^Sr ground state. Further, the ^^Sr(d,p)®^Sr reaction studies (19)(20)(21)(22) The level at 1473.22 keV is the lowest particle-core coupled level appearing in this study.…”