scholarly journals NEUTRON AND PROTON DRIP LINES USING THE MODIFIED BETHE–WEIZSÄCKER MASS FORMULA

2004 ◽  
Vol 13 (04) ◽  
pp. 747-758 ◽  
Author(s):  
D. N. BASU
Keyword(s):  
Mass Formula ◽  
Drip Line ◽  
Magic Numbers ◽  
Neutron Drip Line ◽  
Proton Drip Line ◽  
Rp Process ◽  
R Process

Proton and neutron separation energies are calculated using the extended Bethe–Weizsäcker mass formula. This modified Bethe–Weizsäcker mass formula describes minutely the positions of all the old and the new magic numbers. It accounts for the disappearance of some traditional magic numbers for neutrons and provides extra stability for some new neutron numbers. The neutron and proton drip lines are predicted using this extended Bethe–Weizsäcker mass formula. The implications of the proton drip line on the astrophysical rp-process and of the neutron drip line on the astrophysical r-process are discussed.

scholarly journals NEUTRON RICH NUCLEI IN A NEW BINDING ENERGY FORMULA AND THE ASTROPHYSICAL r-PROCESS

2012 ◽  
Vol 21 (04) ◽  
pp. 1250042 ◽  
Author(s):  
CHIRASHREE LAHIRI ◽  
G. GANGOPADHYAY
Keyword(s):  
Binding Energy ◽  
Mass Formula ◽  
Drip Line ◽  
Present Calculation ◽  
Neutron Drip Line ◽  
Energy Formula ◽  
R Process ◽  
Mass Formulas

Neutron rich nuclei has been studied with a new phenomenological mass formula. Predictions of different mass formulas for the location of the neutron drip line are compared with those from the present calculation. The implications of the new mass formula for r-process nucleosynthesis are discussed. It is found that though the neutron drip line obtained from this formula differs substantially from other formulas, the r-process abundance upto mass 200 are unlikely to be significantly different. The errors inherent in the mass formula are found to play an insignificant role beyond mass A = 80.

PROTON DRIP-LINE CALCULATIONS FOR RP-PROCESS NUCLEI

2002 ◽  
Author(s):  
W. A. RICHTER ◽  
B. A. BROWN ◽  
H. SCHATZ ◽  
R. CLEMENT
Keyword(s):  
Drip Line ◽  
Proton Drip Line ◽  
Rp Process

Proton radioactivity of nuclei with atomic numbers Z = 51–91 and mass number 104–211

2021 ◽  
pp. 2150016
Author(s):  
D. N. Poenaru ◽  
R. A. Gherghescu
Keyword(s):  
Mass Number ◽  
Drip Line ◽  
Neutron Drip Line ◽  
Mass Model ◽  
Proton Drip Line ◽  
Cluster Radioactivity ◽  
Proton Radioactivity ◽  
Asymmetric Fission ◽  
Good Agreement

Proton radioactivity of neutron-deficient nuclei with atomic numbers [Formula: see text]–91 and mass number 104–211 is investigated using the analytical super-asymmetric fission (ASAF) model — a model used to study [Formula: see text]-decay and cluster radioactivity since 1984. The experimental [Formula: see text] values are compared with calculated ones based on WS4 (Y. Z. Wang et al., 2014–2015), and in few cases KTUY05 (H. Koura et al., 2005) mass models. Proton drip-line and neutron drip-line are determined using the WS4 mass model. We compare the calculated results with experimental half-lives, showing good agreement.

scholarly journals STABILITY PENINSULAS ON THE NEUTRON DRIP LINE

2013 ◽  
Vol 22 (02) ◽  
pp. 1350009 ◽  
Author(s):  
V. N. TARASOV ◽  
K. A. GRIDNEV ◽  
D. K. GRIDNEV ◽  
D. V. TARASOV ◽  
S. SCHRAMM ◽  
...  
Keyword(s):  
Drip Line ◽  
Magic Numbers ◽  
Neutron Drip Line ◽  
Form Stability

Using HF+BCS method with Skyrme forces we analyze the neutron drip line. It is shown that the drip line may form stability peninsulas. These peninsulas locate along fixed neutron numbers on the nuclear chart, which correspond to magic and new magic numbers, and are the same for all Skyrme forces. It is found that the size of the peninsulas is sensitive to the choice of Skyrme forces and the most extended peninsulas appear with the SkI2 set.

scholarly journals Pseudospin symmetry in Zr and Sn isotopes from the proton drip line to the neutron drip line

1999 ◽  
Vol 59 (1) ◽  
pp. 154-163 ◽  
Author(s):  
J. Meng ◽  
K. Sugawara-Tanabe ◽  
S. Yamaji ◽  
A. Arima
Keyword(s):  
Pseudospin Symmetry ◽  
Drip Line ◽  
Neutron Drip Line ◽  
Proton Drip Line

scholarly journals Approaching neutron-rich nuclei towards the r-process path in 86Kr-induced collisions at 15 MeV/nucleon

2020 ◽  
Vol 19 ◽  
pp. 72
Author(s):  
G. A. Souliotis
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Drip Line ◽  
Neutron Drip Line ◽  
Magnetic Separator ◽  
Enhanced Production ◽  
Rare Isotopes ◽  
R Process ◽  
Neutron Rich Isotopes

The production cross sections of projectile-like fragments from collisions of 15 MeV/nucleon 86Kr with 64,58Ni and 124,112Sn have been measured using a magnetic separator with emphasis on the neutron-rich isotopes. Neutron pick-up isotopes (with up to 6-8 neutrons picked-up from the target) were observed with large cross sections. The present results were also compared with our previous data of the same reactions at 25 MeV/nucleon. The data at 15 MeV/nucleon show enhanced production of neutron-rich isotopes very close to the projectile, relative to the corresponding data at 25 MeV/nucleon. The large cross sections of such reactions involving peripheral nucleon exchange, indicate that these reactions offer a novel route to access extremely neutron-rich rare isotopes towards the the astrophysical r-process path and the neutron-drip line.

scholarly journals Masses and lifetimes for r-process nucleosynthesis: FRIB outlook

2018 ◽  
Vol 178 ◽  
pp. 04002 ◽  
Author(s):  
Rebecca Surman ◽  
Matthew Mumpower
Keyword(s):  
Neutron Capture ◽  
Drip Line ◽  
Michigan State University ◽  
State University ◽  
Neutron Drip Line ◽  
Rare Isotope ◽  
Abundance Patterns ◽  
Nuclear Masses ◽  
R Process ◽  
Under Construction

Nuclear masses and lifetimes are key inputs for calculations of rapid neutron capture (r-process) nucleosynthesis. Masses and half-lives for thousands of nuclei from the valley of stability to the neutron drip line are required and only a fraction have been experimentally measured. Here we examine the promise of the Facility for Rare Isotope Beams, now under construction at Michigan State University, to dramatically reduce uncertainties in r-process abundance patterns due to uncertain masses and half-lives.

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