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Observation of a St...
Observation of a Strongly Isospin-Mixed Doublet in Si-26 via beta-Delayed Two-Proton Decay of P-26
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- Liu, J. J. (författare)
- Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China.
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- Xu, X. X. (författare)
- Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China.;Univ Hong Kong, Dept Phys, Hong Kong, Peoples R China.;China Inst Atom Energy, Dept Nucl Phys, Beijing 102413, Peoples R China.;Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China.;Adv Energy Sci & Technol Guangdong Lab, Huizhou 516003, Peoples R China.
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- Sun, L. J. (författare)
- Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China.;Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA.
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- Qi, Chong, 1983- (författare)
- KTH,Kärnfysik
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Collaboration, R I B L L (författare)
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Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China.;Univ Hong Kong, Dept Phys, Hong Kong, Peoples R China.;China Inst Atom Energy, Dept Nucl Phys, Beijing 102413, Peoples R China.;Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China.;Adv Energy Sci & Technol Guangdong Lab, Huizhou 516003, Peoples R China. (creator_code:org_t)
- American Physical Society (APS), 2022
- 2022
- Engelska.
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Ingår i: Physical Review Letters. - : American Physical Society (APS). - 0031-9007 .- 1079-7114. ; 129:24
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- beta decay of proton-rich nuclei plays an important role in exploring isospin mixing. The beta decay of P-26 at the proton drip line is studied using double-sided silicon strip detectors operating in conjunction with high-purity germanium detectors. The T = 2 isobaric analog state (IAS) at 13 055 keV and two new high-lying states at 13 380 and 11 912 keV in Si-26 are unambiguously identified through beta-delayed two-proton emission (beta 2p). Angular correlations of two protons emitted from Si-26 excited states populated by P-26 beta decay are measured, which suggests that the two protons are emitted mainly sequentially. We report the first observation of a strongly isospin-mixed doublet that deexcites mainly via two-proton decay. The isospin mixing matrix element between the Si-26 IAS and the nearby 13 380-keV state is determined to be 130(21) keV, and this result represents the strongest mixing, highest excitation energy, and largest level spacing of a doublet ever observed in beta-decay experiments.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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