Radiations from P 30 , Cl 34 , and<mml:math xmlns:mml="…
1956; American Institute of Physics; Volume: 101; Issue: 2 Linguagem: Inglês
10.1103/physrev.101.776
ISSN1536-6065
AutoresDavid L. Green, J. Reginald Richardson,
Tópico(s)Neutrino Physics Research
ResumoResults are reported on the measurement of the radiations from the 2.55-min activity in ${\mathrm{P}}^{30}$, the 32.40\ifmmode\pm\else\textpm\fi{}0.04 min activity in ${\mathrm{Cl}}^{34}$ and the 7.7-min activity in ${\mathrm{K}}^{38}$ by means of a large double-lens spectrometer and a NaI scintillation spectrometer. ${\mathrm{P}}^{30}$ has a simple positron spectrum with end point at 3.24\ifmmode\pm\else\textpm\fi{}0.04 Mev and no gamma rays or conversion electrons. ${\mathrm{Cl}}^{34}$ has a complex positron spectrum with end points at 4.50\ifmmode\pm\else\textpm\fi{}0.03 Mev 2.48\ifmmode\pm\else\textpm\fi{}0.07 Mev, and 1.33\ifmmode\pm\else\textpm\fi{}0.10 Mev. ${\mathrm{K}}^{38}$ has a simple positron spectrum with end point at 2.68\ifmmode\pm\else\textpm\fi{}0.04 Mev and no conversion electrons. These results indicate an $\mathrm{ft}$ value for the ground ($T=1$) state of ${\mathrm{Cl}}^{34}$ of 3160\ifmmode\pm\else\textpm\fi{}120 sec, and indicate that the ground states of ${\mathrm{P}}^{30}$ and ${\mathrm{K}}^{38}$ are probably the $T=0$ states.
Referência(s)