Observation of the First <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>z</mi></mrow></msub></mrow><mo>=</mo><mo>−</mo><mfrac><mrow><mn>5</mn></mrow><mrow><mn>2</mn></mrow></mfrac></math> Nuclide, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ca</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>35</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>, via Its <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>β</mi></math>-Delayed Two-Proton Emission

J. Äystö; D. M. Moltz; X. J. Xu; J. E. Reiff; Joseph Cerny

doi:10.1103/PhysRevLett.55.1384

Observation of the First $T_{z} = - \frac{5}{2}$ Nuclide, ${}^{35}{Ca}$ , via Its $β$ -Delayed Two-Proton Emission

J. Äystö, D. M. Moltz, X. J. Xu, J. E. Reiff, and Joseph Cerny

Phys. Rev. Lett. 55, 1384 – Published 23 September 1985

Abstract

The decay of the $T = \frac{5}{2}$ isobaric analog state in ${}^{35}K$ at 9053 ± 45 keV, fed by the superallowed $β$ decay of 50 ± 30-ms ${}^{35}{Ca}$ , results in two-proton emission to both the ground and the first excited states of ${}^{33}{Cl}$ . The measured energy correlations between the two decay protons indicate a sequential-decay mechanism. From the isobaric-multiplet mass equation, a mass excess of 4453 ± 60 keV can be predicted for the ground state of ${}^{35}{Ca}$ .