Proton Radioactivity of Heavy Nuclei of Atomic Number Range 72 < Z < 88

2020 ◽  
Vol 17 (7) ◽  
pp. 909-915
Author(s):  
H. C. Manjunatha ◽  
M. G. Srinivas ◽  
N. Sowmya ◽  
P. S. Damodara Gupta ◽  
Alfred Cecil Raj
Keyword(s):  
Atomic Number ◽  
Heavy Nuclei ◽  
Number Range ◽  
Proton Radioactivity

Investigations on the study of entrance channel effects in synthesis of superheavy elements using Cr-induced fusion reactions

2020 ◽  
Vol 29 (08) ◽  
pp. 2050061
Author(s):  
H. C. Manjunatha ◽  
N. Manjunatha ◽  
L. Seenappa
Keyword(s):  
Atomic Number ◽  
Asymmetry Parameter ◽  
Superheavy Elements ◽  
Entrance Channel ◽  
Heavy Nuclei ◽  
Fusion Reactions ◽  
Number Range ◽  
Mass Asymmetry ◽  
Number Formula ◽  
Super Heavy Nuclei

We have investigated the synthesis of superheavy elements using Cr-induced fusion reactions. We have studied all possible Cr-induced fusion reactions for the synthesis of super heavy nuclei [Formula: see text]. We have achieved the semi-empirical formula for fusion barrier heights ([Formula: see text]), positions ([Formula: see text]), curvature of the inverted parabola ([Formula: see text]) of Cr-induced fusion reactions for the synthesis of superheavy nuclei with atomic number range [Formula: see text]. The proposed formula produces fusion barriers of Cr-induced fusion reactions for the synthesis of super heavy nuclei with the simple inputs of mass number ([Formula: see text]) and atomic number ([Formula: see text]) of projectile-targets. We have also identified the targets for Cr-induced fusion reactions to synthesis superheavy elements of [Formula: see text]. We have also studied the entrance channel parameters such as mass asymmetry ([Formula: see text]), charge asymmetry ([Formula: see text]), coulomb interaction parameter ([Formula: see text]’), Businaro–Gallone mass asymmetry parameter ([Formula: see text]) and Isospin asymmetry parameter [[Formula: see text]]. We hope that our predictions may be the guide for the future experiments in the synthesis of more superheavy elements using [Formula: see text]Cr-induced fusion reactions.

Observing the Chemical State of Elements With Z=21 To 28 From L Alpha1 To L L Ratios With Energy Dispersive Spectroscopy (EDS)

1999 ◽  
Vol 5 (S2) ◽  
pp. 590-591
Author(s):  
A. Sandborg ◽  
R. Anderhalt
Keyword(s):  
High Resolution ◽  
Atomic Number ◽  
Energy Dispersive Spectroscopy ◽  
Emission Spectra ◽  
Outer Electron ◽  
Number Range ◽  
X Ray ◽  
Chemical Effects ◽  
Intensity Changes ◽  
Electron Shells

It is well known that chemical bonding affects elemental x-ray emission spectra. The spectra of low atomic number elements show energy shifts which depend on the bonding of the element. To observe these shifts, a high resolution wavelength dispersive (WDS) x-ray spectrometer is required. Intensity variations of the L series can be observed with an EDS system which also show chemical effects.The L Alphal and the L L radiations are produced from a vacancy in the L III shell. Normally the L L line is about 5 to 6% of the intensity of the L Alphal line. However, in the atomic number range of Z=21 to 28, it is easily observed that the L L line becomes more intense. The L Alphal is no longer present at Z=20. These intensity changes are due to the outer electron shells of these atoms being unfilled. The L Alphal comes from the L3-M5 transition, while the L L comes from L3-M1 transition. The M5 (3d level) of the M shell is partially filled for Z=21 to 28; empty for Z<21and full for Z> 28. Holliday observed a Ti LL which was 17% greater than the Ti L Alphal.

Measurement of the Kα to Lα and Kβ to Lβ intensity ratios of seven elements in the atomic number range 52≤Z≤62 using photoionization at 59.5 keV1

2004 ◽  
Vol 97 (2) ◽  
pp. 172-175 ◽  
Author(s):  
A. Küçükönder ◽  
Ö. Söğüt ◽  
E. Küçükönder ◽  
E. Büyükkasap
Keyword(s):  
Atomic Number ◽  
Number Range ◽  
Intensity Ratios

Measurement of L shell fluorescence yields of seven elements in the atomic number range 79Z92 using photoionization

1999 ◽  
Vol 28 (2) ◽  
pp. 91-93 ◽  
Author(s):  
Önder Şimşek ◽  
O??uz Do??an ◽  
Ümit Turgut ◽  
Mehmet Ertu??rul ◽  
Hasan Erdo??an
Keyword(s):  
Atomic Number ◽  
Number Range

A study of alpha-decay using effective liquid drop model

2021 ◽  
Author(s):  
G. R. Sridhara ◽  
H. C. Manjunatha ◽  
N. Sowmya ◽  
P. S. Damodara Gupta
Keyword(s):  
Atomic Number ◽  
Liquid Drop ◽  
Alpha Decay ◽  
Nucl Phys ◽  
Spin Effect ◽  
Liquid Drop Model ◽  
Number Range ◽  
Formation Probability ◽  
Semi Empirical

In this paper, we have made an attempt to analyze the alpha-decay half-lives of in the atomic number range [Formula: see text] by considering an effective liquid drop model. The role of pre-formation probability by including iso-spin effect is included during an evaluation of half-lives. We have also compared the studied alpha-decay half-lives with that of semi-empirical formulae such as Viola Seaborg semi-empirical formulae (VSS) [J. Inorg. Nucl. Chem. 28 (1966) 741; Nucl. Phys. A 848 (2010) 279], Royer formulae [J. Phys. G: Nucl. Part. Phys. 26 (2000) 1149; Phys. Rev. C 101 (2020) 034307] and also with that of the available experiments. From this comparison, it can be concluded that the effective liquid drop model produces an alpha-decay half-lives close to the experiments.

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