Beta-delayed proton decay of the Tz = −2 isotope 26P

doi:10.1016/0370-2693(83)90950-4

Physics Letters B

Volume 123, Issues 1–2, 24 March 1983, Pages 25-28

https://doi.org/10.1016/0370-2693(83)90950-4 Get rights and content

Abstract

The ²⁸Si(³He, p4n)²⁶P reaction at 110–130 MeV has been used to discover the odd-odd T_z = −2 nuclide $^{26} P (_{12} ≈ 20 ms)$ , which was predicted to lie on or beyond the proton drip line. Beta-delayed protons from its decay establish the mass excess of the lowest T = 2 state in ²⁶Si as 5.936 ± 0.015 MeV. Possible beta-delayed two-proton emission from this isotope is discussed.

References (12)

P.M. Endt et al.
Nucl. Phys.
(1978)
I. Kelson et al.
Phys. Lett.
(1966)
M.D. Cable
Phys. Rev.
(1982)
S. Maripuu
At. Data Nucl. Data Tables
(1975)
C. Maples et al.
IEEE Trans. Nucl. Sci. NS-26
(1979)
G. Huber
Phys. Rev.
(1978)

There are more references available in the full text version of this article.

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^☆: This work was supported by the Director, US Office of Energy Research, Division of Nuclear Physics of the Office of High Energy and Nuclear Physics, and by Nuclear Sciences of the Basic Energy Sciences Program of the US Department of Energy under Contract No. DE-ACO3-76SF00098.

¹: On leave from: Department of Physics, University of Jyväskylä, Finland.

²: On leave from: Institute of Atomic Energy, Beijing, China.

³: On leave from: Department of Physics, Nanking University, China.

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Beta-delayed proton decay of the Tz = −2 isotope 26P☆

Abstract

Nucl. Phys.

Phys. Lett.

Phys. Rev.

At. Data Nucl. Data Tables

IEEE Trans. Nucl. Sci. NS-26

Phys. Rev.

Beta-delayed proton decay of the T_z = −2 isotope ²⁶P☆