${}^{36}K$ Decay and $T = 1$ Analog in ${}^{36}{Ar}$

The 23-MeV proton beam from the Michigan State University sector-focused cyclotron was used to produce the

{}^{36}K

isotope by means of the

{}^{36}{Ar} (p, n) {}^{36}K

reaction. From measurements of

γ

rays following the positron decay of

{}^{36}K

, the half-life of

{}^{36}K

was measured to be 0.265±0.025 sec, and energy levels in

{}^{36}{Ar}

were measured at 1.9701±0.0007, 4.1779±0.0007, 4.4401±0.0012, and 6.6119±0.0009 MeV. The 6.6119-MeV level is identified as the

T = 1

analog of the ground states of

{}^{36}{Cl}

and

{}^{36}K

. Branching ratios for the positron decay of

{}^{36}K

were obtained and the

log ft

values computed for each branch, using the observed partial half-life and a computed value of the

{}^{36}K

mass. Spin and parity assignments of 2+ have been made for the ground state of

{}^{36}K

and the

T = 1

level of

{}^{36}{Ar}

, in agreement with the expectation from the previously measured 2+ value of the

{}^{36}{Cl}

ground-state spin.

This publication has 8 references indexed in Scilit:

K36Decay andT=1Analog inAr36