Measurement of elastic12C+αscattering: Above the proton separation energy

2012 ◽  
Vol 85 (4) ◽  
Author(s):  
R. J. deBoer ◽  
A. Couture ◽  
R. Detwiler ◽  
J. Görres ◽  
P. Tischhauser ◽  
...  
Keyword(s):  
Separation Energy ◽  
Proton Separation Energy

PARTICLE-NUMBER PROJECTED TWO-PROTON SEPARATION ENERGY OF THE PROTON-RICH EVEN–EVEN RARE-EARTH NUCLEI USING AN ISOVECTOR PAIRING APPROACH

2009 ◽  
Vol 18 (01) ◽  
pp. 141-160 ◽  
Author(s):  
S. KERROUCHI ◽  
D. MOKHTARI ◽  
N. H. ALLAL ◽  
M. FELLAH
Keyword(s):  
Rare Earth ◽  
Particle Number ◽  
Drip Line ◽  
Separation Energy ◽  
Line Position ◽  
Proton Separation Energy ◽  
Rare Earth Nuclei ◽  
Pairing Correlations ◽  
The One ◽  
Almost All

The two-proton separation energy (S2P) has been studied by describing the pairing correlations using four various approaches: in the pairing between like-particles case with (SBCS) and without (BCS) inclusion of the particle-number projection, as well as in the isovector pairing case with (NP-PROJ) and without (NP) inclusion of the particle-number projection. It has been numerically evaluated for the even–even rare-earth proton-rich nuclei such as Δnp ≠ 0. Among the four used methods, NP-PROJ is the one that provides the results that are closest to the experimental data when available. On the other hand, it has been shown that the S2P values deduced from the four approaches join, for almost all the considered elements, for the highest values of (N - Z). The fact that the BCS and NP (respectively, SBCS and NP-PROJ) values join may be explained by the fact that Δnp decreases with increasing values of (N - Z). It has also been shown that the BCS and SBCS (respectively, NP and NP-PROJ) values of S2P are very close because the discrepancy between the projected and unprojected energy values is quasi-constant as a function of the deformation. Finally, the four used methods lead to the same prediction of the two-proton drip-line position except for the Dysprosium and the Tungsten.

scholarly journals PROTON DRIPLINE FOR ISOTONE N = 18, 20, AND 22 USING MODIFIED RELATIVISTIC MEAN FIELD (MRMF) MODEL

2019 ◽  
Vol 4 (1) ◽  
pp. 1-10
Author(s):  
Jenny Primanita Diningrum ◽  
Anto Sulaksono
Keyword(s):  
Fermi Energy ◽  
Calculation Result ◽  
Research Result ◽  
Mean Field ◽  
Separation Energy ◽  
Relativistic Mean Field ◽  
Proton Separation Energy ◽  
Position Prediction

Determining the position of one- and two-proton dripline for isotone of N = 18, 20, and 22 has been studied through Modified Relativistic Mean Field (MRMF). The model exemplifies three impacts, namely isovector-isoscalar coupling, tensors, and electromagnetic exchange through five parameter set variations. The position of one- and two-proton dripline for the isotones is predicted by applying two methods, which are two-proton separation energy, and Fermi energy. The research shows that the prediction of one- and two-proton dripline for isotone of N = 18, and N = 20 is positioned at Z = 22 and Z = 26 consecutively.  Then, the prediction of one- and two-proton dripline for isotone of N = 22 has two positions, Z = 26 and Z = 28. The calculation result indicates that the position prediction for isotone of N = 18, N = 20, and N = 22 is following the research result conducted by Nazarewicz with RMF+NLSH model [1]. Meanwhile, isovector-isoscalar coupling, tensors, and electromagnetic exchange do not affect massively for the position prediction of two-proton dripline. However, the three methods affect one-proton dripline.

Determination of the proton separation energy ofRh93from mass measurements

2008 ◽  
Vol 78 (2) ◽  
Author(s):  
J. Fallis ◽  
J. A. Clark ◽  
K. S. Sharma ◽  
G. Savard ◽  
F. Buchinger ◽  
...  
Keyword(s):  
Separation Energy ◽  
Mass Measurements ◽  
Proton Separation Energy

Proton Separation Energies for Some Rare Earth Isotopes

1975 ◽  
Vol 53 (10) ◽  
pp. 948-953 ◽  
Author(s):  
D. G. Burke ◽  
J. M. Balogh
Keyword(s):  
Rare Earth ◽  
Proton Transfer ◽  
Transfer Reactions ◽  
Separation Energy ◽  
Single Proton ◽  
Proton Separation Energy ◽  
Proton Transfer Reactions ◽  
The Absolute ◽  
Q Values

Reaction Q values for the (3He,d) and (α,t) single proton transfer reactions on targets of Gd, Dy, Er, and Yb have been measured with a magnetic spectrograph. Proton separation energies, Sp, are presented for 156,157,158,159,161Tb, 161,162,163,164,165Ho, 165,167,168,169,171Tm, and 171,172,173,174,175,177Lu. Although the uncertainties of the absolute Q values are approximately 15 keV, the use of isotopically mixed and natural targets resulted in probable errors of only 1–3 keV for the differences in Q values of the isotopes identified in each target. As the proton separation energy was previously known to within 1–3 keV for one isotope of each element studied, it is now possible to present SP values with errors of a few keV for ail the nuclides listed above.

scholarly journals STUDY OF TWO-PROTON RADIOACTIVITY WITHIN THE RELATIVISTIC MEAN-FIELD PLUS BCS APPROACH

2012 ◽  
Vol 21 (09) ◽  
pp. 1250076 ◽  
Author(s):  
D. SINGH ◽  
G. SAXENA
Keyword(s):  
Ground State ◽  
Experimental Studies ◽  
Mean Field ◽  
Mass Region ◽  
Separation Energy ◽  
Relativistic Mean Field ◽  
Ground State Properties ◽  
State Dependent ◽  
Proton Separation Energy ◽  
Proton Radioactivity

Inspired by recent experimental studies of two-proton radioactivity in the light-medium mass region, we have employed relativistic mean-field plus state-dependent BCS approach (RMF+BCS) to study the ground state properties of selected even-Z nuclei in the region 20 ≤ Z ≤ 40. It is found that the effective potential barrier provided by the Coulomb interaction and that due to centrifugal force may cause a long delay in the decay of some of the nuclei even with small negative proton separation energy. This may cause the existence of proton-rich nuclei beyond the proton drip-line. Nuclei 38 Ti , 42 Cr , 45 Fe , 48 Ni , 55 Zn , 60 Ge , 63, 64 Se , 68 Kr , 72 Sr and 76 Zr are found to be the potential candidates for exhibiting two-proton radioactivity in the region 20 ≤ Z ≤ 40. The reliability of these predictions is further strengthened by the agreement of the calculated results for the ground state properties such as binding energy, one- and two-proton separation energy, proton and neutron radii, and deformation with the available experimental data for the entire chain of the isotopes of the nuclei in the region 20 ≤ Z ≤ 40.

scholarly journals Effects of NN and  N Tensor Forces on  -Separation Energy of  5He

1981 ◽  
Vol 65 (4) ◽  
pp. 1290-1304 ◽  
Author(s):  
S. Shinmura ◽  
Y. Akaishi ◽  
H. Tanaka
Keyword(s):  
Separation Energy

SHELL DEFORMATION AND SPIN EFFECTS IN NUCLEON SEPARATION ENERGIES

1993 ◽  
Vol 02 (04) ◽  
pp. 789-807
Author(s):  
D. CALEB CHANTHI RAJ ◽  
M. RAJASEKARAN ◽  
R. PREMANAND
Keyword(s):  
Structural Changes ◽  
Shell Correction ◽  
Separation Energy ◽  
Systematic Analysis ◽  
Spin Effects ◽  
Wide Range ◽  
Type Calculation ◽  
Nucleon Separation Energy ◽  
New Formula ◽  
Good Agreement

A new formula to obtain shell correction to separation energy is derived from a Strutinsky type calculation. A systematic analysis of shell and deformation effects on nucleon separation energy is made. Spin induced structural changes are also evident in shape changes along the spin coordinate. Calculations are performed for a wide range of nuclei from Zr to Cm. The results are generally in very good agreement with experimental analysis.

scholarly journals Metal–Organic Framework Hybrid Materials and Their Applications

Crystals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 325 ◽  
Author(s):  
Joshua Sosa ◽  
Timothy Bennett ◽  
Katherine Nelms ◽  
Brandon Liu ◽  
Roberto Tovar ◽  
...  
Keyword(s):  
Small Molecules ◽  
Hybrid Materials ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Gas Storage ◽  
Superior Performance ◽  
Separation Energy ◽  
New Materials ◽  
Metal Organic ◽  
Covalent Modifications

The inherent porous nature and facile tunability of metal–organic frameworks (MOFs) make them ideal candidates for use in multiple fields. MOF hybrid materials are derived from existing MOFs hybridized with other materials or small molecules using a variety of techniques. This led to superior performance of the new materials by combining the advantages of MOF components and others. In this review, we discuss several hybridization methods for the preparation of various MOF hybrids with representative examples from the literature. These methods include covalent modifications, noncovalent modifications, and using MOFs as templates or precursors. We also review the applications of the MOF hybrids in the fields of catalysis, drug delivery, gas storage and separation, energy storage, sensing, and others.

Sign in / Sign up

Export Citation Format

Share Document