scholarly journals Half-life measurement of 7Be in host beryllium metal

2011 ◽  
Vol 1 (1) ◽  
pp. 101-104
Author(s):  
T. Ohtsuki ◽  
K. Hirose ◽  
K. Ohno ◽  
T. Morisato
Keyword(s):  
Decay Rate ◽  
Liquid Helium ◽  
Electron Density ◽  
Electron Capture ◽  
Half Life ◽  
Lithium Fluoride ◽  
Room Temperature ◽  
Life Measurement ◽  
Beryllium Metal

AbstractThe decay rate of an electron-capture nucleus is proportional to the electron density at the nucleus. To see how the decay rate is changed by artificially, we have measured the half-life of7Be in beryllium(Be) metal at room temperature (T=293 K) and at close to the temperature of liquid helium (T=5 K). We found that the half-life of7Be in Be metal at T=293 K is 53.25 ± 0.04 d, which is slightly longer than those in the hosts of graphite, lithium fluoride and other minerals, surveyed so far. Furthermore, that at T=5 K is 53.39 ± 0.04 d, which is 0.26% longer than that at T =293 K.

The influence of the change of electron density on the half-life of56Mn

2014 ◽  
Vol 31 (2) ◽  
pp. 124
Author(s):  
Huibin Sun ◽  
Jian Zhong ◽  
Jiajian Liu ◽  
Qi Luo ◽  
Shipeng Hu
Keyword(s):  
Electron Density ◽  
Half Life

scholarly journals High precision half-life measurement of 125Cs and 125Xe with γ-spectroscopy

2019 ◽  
Vol 986 ◽  
pp. 213-222 ◽  
Author(s):  
T.N. Szegedi ◽  
G.G. Kiss ◽  
I. Öksüz ◽  
T. Szücs ◽  
Gy. Gyürky ◽  
...  
Keyword(s):  
High Precision ◽  
Half Life ◽  
Life Measurement

scholarly journals Metallicity and Superconductivity in Doped Strontium Titanate

2019 ◽  
Vol 10 (1) ◽  
pp. 25-44 ◽  
Author(s):  
Clément Collignon ◽  
Xiao Lin ◽  
Carl Willem Rischau ◽  
Benoît Fauqué ◽  
Kamran Behnia
Keyword(s):  
Liquid Helium ◽  
Free Path ◽  
Coulomb Interaction ◽  
Strontium Titanate ◽  
Room Temperature ◽  
Mean Free Path ◽  
Helium Temperature ◽  
Ongoing Research ◽  
Low Concentrations ◽  
Wide Gap

Strontium titanate is a wide-gap semiconductor avoiding a ferroelectric instability thanks to quantum fluctuations. This proximity leads to strong screening of static Coulomb interaction and paves the way for the emergence of a very dilute metal with extremely mobile carriers at liquid-helium temperature. Upon warming, mobility decreases by several orders of magnitude. Yet, metallicity persists above room temperature even when the apparent mean free path falls below the electron wavelength. The superconducting instability survives at exceptionally low concentrations and beyond the boundaries of Migdal–Eliashberg approximation. An intimate connection between dilute superconductivity and aborted ferroelectricity is widely suspected. In this review, we give a brief account of ongoing research on bulk strontium titanate as an insulator, a metal, and a superconductor.

THE IDENTIFICATION AND HALF LIVES OF FISSION-PRODUCT Rb92 AND Rb93

1960 ◽  
Vol 38 (12) ◽  
pp. 1614-1622 ◽  
Author(s):  
K. Fritze ◽  
T. J. Kennett
Keyword(s):  
Fission Product ◽  
Decay Rate ◽  
Half Life ◽  
Fission Products ◽  
Strontium Isotopes ◽  
A Value ◽  
Γ Ray ◽  
Rubidium Isotopes

The existence of two new rubidium isotopes, Rb92 and Rb93, has been established and their half lives measured. The half lives of these short-lived fission products were determined using a technique of timed precipitations. The values obtained for Rb92 and Rb93 were 5.3 ± 0.5 sec and 5.6 ± 0.5 sec respectively. The half lives of the strontium and yttrium daughters were also determined. The strontium isotopes were studied by observing the decay rate of a characteristic γ-ray peak. For Sr92, the decay of the 1.37-Mev line gave a value of 2.71 ± 0.02 hr. A γ-ray peak at 590 kev, which was found to be associated with Sr93, decayed with a half life of 7.54 ± 0.06 min. The half lives of the yttrium daughters were determined by β counting. The values found for Y92 and Y93 were 3.53 ± 0.02 hr and 10.1 ± 0.1 hr respectively.

scholarly journals Room-temperature spin nutations in a magnetically condensed phase of [Y(pc)2]•

2021 ◽  
Author(s):  
Athanassios Boudalis ◽  
Jorge Enrique Olivares Peña ◽  
Eufemio Moreno Pineda ◽  
Artem Fediai ◽  
Wolfgang Wenzel ◽  
...  
Keyword(s):  
Liquid Helium ◽  
Condensed Phase ◽  
Room Temperature ◽  
Crystal Form ◽  
Temperature Liquid

FID-detected nutations of the antiferromagnetic crystal form of [Y(pc)2]• demonstrated that its radical spin can be coherently driven in the its magnetically condensed undeuterated phase and at room temperature. Liquid-helium...

Electron capture nuclear decay rate under compression in a confined environment

2021 ◽  
Vol 75 (4) ◽  
Author(s):  
A. Ray ◽  
P. Das ◽  
A. K. Sikdar ◽  
S. Pathak ◽  
N. Aquino ◽  
...  
Keyword(s):  
Decay Rate ◽  
Electron Capture ◽  
Nuclear Decay ◽  
Confined Environment

Half-life measurement of excited states in neutron-rich nuclei

2009 ◽  
pp. 463-464
Author(s):  
J. K. Hwang ◽  
A. V. Ramayya ◽  
J. H. Hamilton ◽  
D. Fong ◽  
C. J. Beyer ◽  
...  
Keyword(s):  
Excited States ◽  
Half Life ◽  
Life Measurement

scholarly journals Can Warmer than Room Temperature Electrons Levitate Above a Liquid Helium Surface?

2019 ◽  
Vol 195 (3-4) ◽  
pp. 307-318
Author(s):  
A. D. Chepelianskii ◽  
Masamitsu Watanabe ◽  
Kimitoshi Kono
Keyword(s):  
Liquid Helium ◽  
Room Temperature ◽  
Helium Surface ◽  
Liquid Helium Surface
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