Decay of an isomeric state in Cm244

Hansen, P. G.; Wilsky, K.; Baba, C.V.K.; Vandenbosch, S.E.

doi:10.1016/0029-5582(63)90815-0

Nuclear Physics

1963

DOI: 10.1016/0029-5582(63)90815-0

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Decay of an isomeric state in Cm244

P. G. Hansen¹,

K. Wilsky²,

C.V.K. Baba

et al.

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Cited by 28 publications

(2 citation statements)

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“…The red lines: experimental isomeric state energies (MeV) for N = 148 isotones[32][33][34][35]. The blue lines: theoretical calculation of Delaroche et al[31].…”

mentioning

confidence: 96%

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Stability of the heaviest elements: K isomer in No250

Kallunkathariyil¹,

Sulignano²,

Greenlees³

et al. 2020

Phys. Rev. C

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Decay spectroscopy of 250 No has been performed using digital electronics and pulse-shape analysis of the fast nuclear decays for the first time. Previous studies of 250 No reported two distinct fission decay lifetimes, related to the direct fission of the ground state and to the decay of an isomeric state but without the possibility to determine if the isomeric state decayed directly via fission or via internal electromagnetic transitions to the ground state. The data obtained in the current experiment allowed the puzzle to finally be resolved, attributing the shorter half-life of t 1/2 = 3.8 ± 0.3 μs to the ground state and the longer half-life t 1/2 = 34.9 +3.9 −3.2 μs to the decay of an isomeric state. 250 No becomes, thus, one of a very few examples of very heavy nuclei with an isomeric state living considerably longer than its ground state. This phenomenon has important consequences for the nuclear-structure models aiming to determine the borders of the island of stability of superheavy elements.

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“…The red lines: experimental isomeric state energies (MeV) for N = 148 isotones[32][33][34][35]. The blue lines: theoretical calculation of Delaroche et al[31].…”

mentioning

confidence: 96%

“…A summary of experimental [32][33][34][35] and theoretical information [31] for the isomeric states in N = 148 isotones is shown in Fig. 5.…”

mentioning

confidence: 99%

Stability of the heaviest elements: K isomer in No250

Kallunkathariyil¹,

Sulignano²,

Greenlees³

et al. 2020

Phys. Rev. C

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show abstract

Search for a spontaneous fission branch in a metastable state of 214Cm

Vandenbosch

Fields

Vandenbosch

et al. 1964

Journal of Inorganic and Nuclear Chemistry

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Decay of an isomeric state in U234

Hansen¹,

Wilsky²,

Bjørnholm³

1963

Nuclear Physics

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Decay of an isomeric state in Cm244

Cited by 28 publications

References 8 publications

Stability of the heaviest elements: K isomer in No250

Stability of the heaviest elements: K isomer in No250

Search for a spontaneous fission branch in a metastable state of 214Cm

Decay of an isomeric state in U234

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