PROPERTIES OF ALPHA DECAY TO ROTATIONAL BANDS OF HEAVY NUCLEI

2010 ◽  
Vol 19 (10) ◽  
pp. 1961-1971 ◽  
Author(s):  
Y. Z. WANG ◽  
J. Z. GU ◽  
J. M. DONG ◽  
B. B. PENG
Keyword(s):  
Experimental Data ◽  
Ground State ◽  
Liquid Drop ◽  
Alpha Decay ◽  
Branching Ratios ◽  
Heavy Nuclei ◽  
Liquid Drop Model ◽  
Α Decay ◽  
Rotational Bands ◽  
Good Agreement

In the framework of the generalized liquid drop model (GLDM) and improved Royer's formula, we investigate the branching ratios and half-lives of α-decay to the members of the ground-state rotational bands of heavy even–even Fm and No isotopes. The calculated results are in good agreement with the available experimental data and some useful predictions are provided for future experiments.

Systematic study on α-decay half-lives of Bi isotopes

2016 ◽  
Vol 25 (08) ◽  
pp. 1650056 ◽  
Author(s):  
J. P. Cui ◽  
Y. L. Zhang ◽  
S. Zhang ◽  
Y. Z. Wang
Keyword(s):  
Experimental Data ◽  
Nuclear Structure ◽  
Systematic Study ◽  
Isomeric State ◽  
Ground State ◽  
Liquid Drop ◽  
Liquid Drop Model ◽  
Α Decay

Systematic calculations on [Formula: see text]-decay half-lives of Bi isotopes are performed by using the generalized liquid drop model (GLDM) and several sets of Royer’s analytic formulas. In calculations, the [Formula: see text] transitions include the ones of (i) ground state (g.s.) to g.s., (ii) g.s. to isomeric state (i.s.), (iii) i.s. to g.s., (iv) i.s. to i.s. According to the comparison between the calculated half-lives and the experimental data, it is found that the experimental half-lives are reproduced well by the GLDM with the cluster-like mode. This indicates that the nuclear structure details play important roles in the [Formula: see text]-decay half-lives. In addition, it is found that the experimental half-lives are not reproduced well by these analytic formulas because the parameters are obtained by fitting the experimental half-lives of g.s. to g.s. transitions. To give better predictions on [Formula: see text]-decay half-lives, the parameters in these formulas should be refitted by including the experimental [Formula: see text]-transition of (ii)–(iv) mentioned above.

Theoretical cluster decay predictions for the nuclei 245−260Md with different nuclear potentials

2020 ◽  
pp. 2050095
Author(s):  
A. M. Izadpanah ◽  
S. S. Hosseini ◽  
V. Zanganeh
Keyword(s):  
Experimental Data ◽  
Potential Model ◽  
Liquid Drop ◽  
Alpha Decay ◽  
Cluster Decay ◽  
Liquid Drop Model ◽  
Proximity Potential ◽  
Cluster Radioactivity ◽  
Universal Formula ◽  
Good Agreement

We have studied systematically the alpha decay and cluster radioactivity half-life of heavy [Formula: see text]Mendelevium ([Formula: see text]) isotopes. The alpha decays from Md isotopes have been studied within the framework of Coulomb and proximity potential model using 14 different versions of nuclear potentials. Also, we have studied the half-lives of alpha decay of Md nuclei within the nuclear potentials generalized liquid drop model (GLDM) and also within GLDM with modified different nuclear potentials, namely proximity potential 2010, 1977, 1988, 2000 and 2002. Moreover, the half-lives of the [Formula: see text]-decay and cluster radioactivity calculated using the Universal formula for cluster decay (UNIV) of Poenaru et al., the Universal decay law (UDL) of Qi et al. and the Unified formula of half-lives for both the [Formula: see text]-decay and cluster radioactivity (UFADCR) of Ni et al. and found to be in good agreement. Our results have been compared with experimental data and demonstrate the acceptability of the approach. Among the different proximity potentials, GLDM with proximity 1977 version (GLDM[Formula: see text][Formula: see text][Formula: see text]P77) ([Formula: see text]) provides the best description for alpha decay studies with low deviation.

ALPHA DECAY HALF-LIVES OF EXOTIC NUCLEI AROUND SHELL CLOSURES

2011 ◽  
Vol 20 (01) ◽  
pp. 127-138 ◽  
Author(s):  
Y. Z. WANG ◽  
Q. F. GU ◽  
J. M. DONG ◽  
B. B. PENG
Keyword(s):  
Liquid Drop ◽  
Alpha Decay ◽  
Exotic Nuclei ◽  
Future Research ◽  
Liquid Drop Model ◽  
Α Decay ◽  
Shell Closures ◽  
Experimental Values ◽  
Closed Shells ◽  
Good Agreement

In the framework of the generalized liquid drop model (GLDM) and improved Royer's formula with a set of new coefficients derived by N. D. Schubert et al. [Eur. Phys. J. A42 (2009) 121], the favored and unfavored α-decay half-lives of exotic nuclei around closed shells Z = 82 and N = 126 are investigated. The calculated results are in good agreement with the experimental data. It is shown that our method can be used to study the α-decay half-lives of exotic nuclei around shell closures successfully and is helpful for future research on superheavy nuclei around the next proton and neutron shell closures. In addition, some α-decay half-lives for the cases where the experimental values are unavailable are predicted. We hope our predicted results are useful for future experiments.

Alpha decay half-lives of heavy nuclei within a generalized liquid drop model

2009 ◽  
Vol 33 (S1) ◽  
pp. 95-97 ◽  
Author(s):  
Zhang Hong-Fei ◽  
Wang Zu-Kai ◽  
Cheng Xi-Meng ◽  
Zuo-Wei ◽  
Li Jun-Qing
Keyword(s):  
Liquid Drop ◽  
Alpha Decay ◽  
Heavy Nuclei ◽  
Liquid Drop Model

scholarly journals A NEW PHENOMENOLOGICAL FORMULA FOR GROUND-STATE BINDING ENERGIES

2011 ◽  
Vol 20 (01) ◽  
pp. 179-190 ◽  
Author(s):  
G. GANGOPADHYAY
Keyword(s):  
Binding Energy ◽  
Single Particle ◽  
Ground State ◽  
Liquid Drop ◽  
Alpha Decay ◽  
Binding Energies ◽  
Present Calculation ◽  
Mean Square ◽  
Liquid Drop Model ◽  
The One

A phenomenological formula based on liquid drop model has been proposed for ground-state binding energies of nuclei. The effect due to bunching of single particle levels has been incorporated through a term resembling the one-body Hamiltonian. The effect of n–p interaction has been included through a function of valence nucleons. A total of 50 parameters has been used in the present calculation. The root mean square (r.m.s.) deviation for the binding energy values for 2140 nuclei comes out to be 0.376 MeV, and that for 1091 alpha decay energies is 0.284 MeV. The correspondence with the conventional liquid drop model is discussed.

ALPHA-DECAY VERSUS ALPHA-CLUSTERING

2008 ◽  
Vol 17 (10) ◽  
pp. 2283-2289 ◽  
Author(s):  
D. S. DELION
Keyword(s):  
Experimental Data ◽  
Mean Field ◽  
Alpha Decay ◽  
Heavy Nuclei ◽  
Α Decay ◽  
Cluster Component ◽  
Alpha Clustering

The strength and shape of α-clusters in medium and heavy nuclei are analyzed by using α-decay experimental data. It turns out that the emitters above magic nuclei contain an important α-cluster component, not described within the standard mean field plus pairing approach.

ALPHA-DECAYS TO MEMBERS OF GROUND-STATE ROTATIONAL BAND OF HEAVY EVEN-EVEN NUCLEI

2008 ◽  
Vol 17 (supp01) ◽  
pp. 29-36 ◽  
Author(s):  
CHANG XU ◽  
ZHONGZHOU REN
Keyword(s):  
Experimental Data ◽  
Angular Momentum ◽  
Rotational Band ◽  
Ground State ◽  
Daughter Nucleus ◽  
Branching Ratios ◽  
Decay Energy ◽  
Α Decay ◽  
Barrier Penetration ◽  
Excitation Probability

We apply a simple barrier penetration approach to calculate α-decay branching ratios to members of ground-state rotational band of heavy even-even nuclei. The influence of α-decay energy, the angular momentum of α-particle, and the excitation probability of the daughter nucleus is taken into account in our calculations. The theoretical branching ratios of α-transitions are found to agree with the available experimental data well.

A systematic study of alpha decay in actinide nuclei using modified generalized liquid drop model

2021 ◽  
pp. 2150013
Author(s):  
H. C. Manjunatha ◽  
G. R. Sridhar ◽  
N. Sowmya ◽  
P. S. Damodara Gupta ◽  
H. B. Ramalingam
Keyword(s):  
Experimental Data ◽  
Angular Momentum ◽  
Coulomb Interaction ◽  
Potential Barrier ◽  
Systematic Study ◽  
Liquid Drop ◽  
Alpha Decay ◽  
Liquid Drop Model ◽  
Barrier Penetration ◽  
Penetration Probability

The alpha decay half-lives of actinides within modified generalized liquid drop model (MGLDM) are investigated by the Wentzel–Kramers–Brillouin (WKB) barrier penetration probability. The potential barrier was studied taking in to account of nuclear proximity, coulomb interaction and centrifugal potential with the inclusion of angular momentum. This work predicts the alpha decay half-lives of unknown actinide nuclei such as [Formula: see text]Am, [Formula: see text]Cm, [Formula: see text]Bk, [Formula: see text]Es and [Formula: see text]No. The calculated alpha decay half-lives reproduce accurately the experimental data. The predictions provided for the alpha decay half-lives within the MGLDM may be helpful for identifying the new isotopes in this field.

scholarly journals α-decay half-lives of some nuclei from ground state to ground state using different nuclear potential

2018 ◽  
Vol 4 ◽  
pp. 5
Author(s):  
Dashty T. Akrawy
Keyword(s):  
Experimental Data ◽  
Ground State ◽  
Potential Model ◽  
Nuclear Potential ◽  
Proximity Potential ◽  
Α Decay ◽  
Good Agreement

Theoretical α-decay half-lives of some nuclei from ground state to ground state are calculated using different nuclear potential model including Coulomb proximity potential (CPPM), Royer proximity potential and Broglia and Winther 1991. The calculated values comparing with experimental data, it is observed that the CPPM model is in good agreement with the experimental data.

On the Stability of Superheavy Nuclei against Fission, Alpha Decay and Electron Capture

1971 ◽  
Vol 26 (4) ◽  
pp. 643-652 ◽  
Author(s):  
Jens Grumann ◽  
Tihomir Morovic ◽  
Walter Greiner
Keyword(s):  
Potential Energy ◽  
Electron Capture ◽  
Spontaneous Fission ◽  
Energy Surface ◽  
Liquid Drop ◽  
Alpha Decay ◽  
Superheavy Nuclei ◽  
Liquid Drop Model ◽  
Α Decay ◽  
The Stability

AbstractThe potential energy surface has been calculated by two methods which are compared with re­spect to spontaneous fission. In the first one essentially the sum of the single particle energies is computed as was done in a previous paper3 while in the second one the Strutinsky technique of renormalizing to a liquid drop model has been applied. Also the half-lives for electron capture are investigated together with the predictions of the half-lives for spontaneous fission and α-decay. The results support the existence of superheavy nuclei in the regions around Z = 114 and Z = 164.

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