Confirmed proton radioactivity of 53Com

Cerny, Joseph; Esterl, John E.; Gough, Richard; Sextro, R.G.

doi:10.1016/0370-2693(70)90270-4

Cited by 118 publications

(63 citation statements)

References 6 publications

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“…dressing of the diproton decay mode by virtual 1p excitations does not change significantly its properties in 45 Fe, 48 Ni and 54 Zn ‡. On the other hand, this idealized decay mode represents a sensible approximation of the 2p decay process described by (8) only if the virtual sequential decay path is strongly suppressed. This in turn depends directly on the dynamics of the Q, P and P, T virtual couplings.…”

Section: Discussionmentioning

confidence: 99%

“…A similar type of proton emission from an excited state was observed in the search for β-delayed proton emission from 53 Ni. Instead of populating 53 Ni, the authors [7,8] observed the population and decay of 53 Co m . This isomer (T 1/2 = 247 ms) decays with a branching ratio of 1.5% by emission of a 1.59(3) MeV proton.…”

Section: The Discovery Of One-proton Radioactivitymentioning

confidence: 99%

“…Today about 25 ground-state one-proton emitters are known [6]. Proton emission was also observed in many cases from long-lived excited states, the first being 53m Co [7,8,9]. The study of one-proton radioactivity allowed testing the nuclear mass surface, to determine the sequence of single-particle levels and the detailed structure of the wave function of the emitted proton ("j content" of the wave function), and to investigate nuclear deformation beyond the proton drip line.…”

Section: Introductionmentioning

confidence: 99%

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Two-proton radioactivity

2008

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Abstract.In the first part of this review, experimental results which lead to the discovery of two-proton radioactivity are examined. Beyond two-proton emission from nuclear ground states, we also discuss experimental studies of two-proton emission from excited states populated either by nuclear β decay or by inelastic reactions. In the second part, we review the modern theory of two-proton radioactivity. An outlook to future experimental studies and theoretical developments will conclude this review.

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Section: Discussionmentioning

confidence: 99%

Section: The Discovery Of One-proton Radioactivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Two-proton radioactivity

2008

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“…The decay of 53 Co from its isomeric state was the first experimental observation of proton radioactivity [1,2]. The proton emission from the ground state of mother nuclei with masses in the range 110 ≤ A ≤ 150 was measured in the early 1980s [3].…”

Section: Introductionmentioning

confidence: 99%

Proton emission half-lives within a Gamow-like model

et al. 2016

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Abstract. Proton emission is described using a model which has previously given good results in the description of α and cluster radioactivity. The simple phenomenological formalism, based on the Gamow theory for alpha decay, is now extended by including the centrifugal term. The model contains only one parameter: the effective nuclear radius constant. Its value was once found for alpha and cluster emitters. A good agreement with the experimental half-lives for proton radioactivity is achieved without any additional fitting procedures to the data for proton emission.

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“…One of the typical representatives is the proton radioactivity at the vicinity of proton drip line, firstly observed in an isomeric state of 53 Co in 1970 [1,2]. Since then more and more proton emitters ranging from Z = 51 to 83 have been identified with nuclear ground states or isomeric states [3].…”

mentioning

confidence: 99%

Proton radioactivity described by covariant density functional theory with the similarity renormalization group method

et al. 2014

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Half-life of proton radioactivity of spherical proton emitters is studied within the scheme of covariant density functional (CDF) theory, and for the first time the potential barrier that prevents the emitted proton is extracted with the similarity renormalization group (SRG) method, in which the spin-orbit potential along with the others that turn out to be non-negligible can be derived automatically. The spectroscopic factor that is significant is also extracted from the CDF calculations. The estimated half-lives are found in good agreement with the experimental values, which not only confirms the validity of the CDF theory in describing the proton-rich nuclei, but also indicates the prediction power of present approach to calculate the half-lives and in turn to extract the structural information of proton emitters. With continuous development of the radioactive ion beam facilities, the exotic nuclei far away from the β-stability line attract extensive interests for the new phenomena they present. One of the typical representatives is the proton radioactivity at the vicinity of proton drip line, firstly observed in an isomeric state of 53 Co in 1970 [1, 2]. Since then more and more proton emitters ranging from Z = 51 to 83 have been identified with nuclear ground states or isomeric states [3]. Essentially, it is significant to study the proton emission which corresponds to the fundamental existence limits of neutron-deficient nuclei, i.e., the proton drip line, and it also can be treated as the inverse reaction of the rapid proton capture process that plays an important role in understanding the origin of the elements in the universe [4]. Moreover specific aspects of nucleonic interactions could be isolated and amplified in the proton emitters due to their extreme proton excess [5]. In particular combined with theoretical analysis, nuclear structural information can be extracted from measurements of half-life, proton branching ratio (fine structure), the energy and angular momentum transfer l carried away by the emitted proton, etc. The fact that the half-life of proton emission is sensitive to the Q-value and angular momentum transfer l, not only helps to determine the orbit of the emitted proton in parent nucleus in experiments, but also provides an efficient way to test theoretical models in exploring the neutron-deficient nuclear systems.Theoretically various methods have been employed in describing the properties of proton emitters, such as the spectroscopic factor and the half-life (for review see Ref.[6]). For the half-life that can be measured experimentally, a semiclassical method is applied by treating the proton emission as quantum tunneling through a potential barrier, which is composed of the Coulomb repulsion, centrifugal barrier and effective nuclear potential. Several approaches have been employed in constructing the effective nuclear potential, e.g., in terms of the density-dependent M3Y effective interaction [7], the effective interaction of Jeukenne, Lejeume, and Mahaux [8], the renormalized...

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Confirmed proton radioactivity of 53Com

Cited by 118 publications

References 6 publications

Two-proton radioactivity

Two-proton radioactivity

Proton emission half-lives within a Gamow-like model

Proton radioactivity described by covariant density functional theory with the similarity renormalization group method

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