scholarly journals K-Capture in the Decay of 191Pt

1990 ◽  
Vol 43 (3) ◽  
pp. 283 ◽  
Author(s):  
HS Binarh ◽  
Harjinder Singh ◽  
SS Ghumman ◽  
HS Sahota
Keyword(s):  
Electron Capture ◽  
Gamma Rays ◽  
Hpge Detector ◽  
X Rays ◽  
Coincidence Method ◽  
Decay Energy ◽  
Electron Capture Decay ◽  
Decay Properties ◽  
Different Levels

Relative K-capture probabilities to three levels of 1911r are determined from the decay of 191 Pt using the sum coincidence method based on summing of gamma rays and K X-rays in a single HPGe detector. The results agree with theoretical values. The electron-capture decay energy calculated using j3-decay properties to different levels belonging to the same rotational family is in agreement with the experimental value.

Half-Life Determination of 41Ca and Some Other Radioisotopes

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 436-446 ◽  
Author(s):  
Walter Kutschera ◽  
Irshad Ahmad ◽  
Michael Paul
Keyword(s):  
Mass Spectrometry ◽  
Electron Capture ◽  
Half Life ◽  
Specific Activity ◽  
Low Energy ◽  
X Rays ◽  
Weighted Mean ◽  
Electron Capture Decay

We have performed a new determination of the half-life of 41Ca by measuring the specific activity of an enriched Ca material with known 41Ca abundance. We measured the activity via the 3.3-keV X-rays emitted in the electron capture decay of 41Ca, and the 41Ca abundance was measured by low-energy mass spectrometry. The result, t1/2 = (1.01 ± 0.10) × 105 yr, agrees with the recent ‘geological’ half-life of Klein et al., (1991), t1/2 = (1.03 ± 0.07) × 105 yr, and with the corrected value of Mabuchi et al. (1974), t1/2 = (1.13 ± 0.12) × 105 yr. We recommend the weighted mean of these three measurements, t1/2 = (1.04 ± 0.05) × 105 yr, as the most probable half-life of 41Ca. We also discuss the situation of the radioisotopes, 32Si, 44Ti, 79Se and 126Sn, whose half-lives, though still uncertain, are potentially interesting for future AMS studies and other applications.

On the electron capture decay energy of 64 153 Gd

1956 ◽  
Vol 4 (1) ◽  
pp. 88-95 ◽  
Author(s):  
R. K. Gupta ◽  
S. Jha
Keyword(s):  
Electron Capture ◽  
Decay Energy ◽  
Electron Capture Decay

The decay of 144Pm

1968 ◽  
Vol 46 (19) ◽  
pp. 2181-2187 ◽  
Author(s):  
S. Santhanam
Keyword(s):  
Excited State ◽  
Electron Capture ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Energy Levels ◽  
The State ◽  
Electron Capture Decay ◽  
First Excited State ◽  
Crossover Transition

In the electron-capture decay of 144Pm prepared by (p, 2n) reaction on enriched 145Nd, it is shown that, in addition to the well-known energy levels at 696, 1313, and 1789 keV, two new levels exist, one at 2093 keV, and another at 1509 keV. The state at 2093 keV deexcites with the emission of a 304-keV gamma ray to the 6+ level at 1789 keV, and by a crossover transition to the 4+ level at 1313 keV with the emission of a 780-keV gamma ray. The level at 1509 keV leads to the first excited state (2+) at 696 keV with the emission of a gamma ray of energy 813 keV. The intensities of the 780-, 304-, and 813-keV gamma rays are, respectively, 1.5, ≈ 0.1, and 0.5% of that of the 696-keV gamma ray.

scholarly journals Electron Capture Decay Energies of 153Gd and 175Hf

1985 ◽  
Vol 38 (5) ◽  
pp. 671 ◽  
Author(s):  
Ralph-D von Dincklage
Keyword(s):  
Electron Capture ◽  
Nuclear Reactions ◽  
Electron Capture Decay ◽  
Different Levels ◽  
Q Values

The electron capture Q values of 153Gd and 175Hf are analysed by using properties of their /3 decays to different levels belonging to the same rotational family in the daughter atoms. The results are Q = 500 go keV for 153Gd and Q = 700 go keV for 175Hf. They agree with data from nuclear reactions but reject smaller values based on K capture probabilities.

Nuclear Electrons and Nuclear Structure

2018 ◽  
Author(s):  
Roger H. Stuewer
Keyword(s):  
Nuclear Structure ◽  
Beta Decay ◽  
Gamma Rays ◽  
Alpha Particle ◽  
Continuous Distribution ◽  
Alpha Particles ◽  
Light Nuclei ◽  
Coincidence Method ◽  
Wolfgang Pauli ◽  
Beta Particles

Serious contradictions to the existence of electrons in nuclei impinged in one way or another on the theory of beta decay and became acute when Charles Ellis and William Wooster proved, in an experimental tour de force in 1927, that beta particles are emitted from a radioactive nucleus with a continuous distribution of energies. Bohr concluded that energy is not conserved in the nucleus, an idea that Wolfgang Pauli vigorously opposed. Another puzzle arose in alpha-particle experiments. Walther Bothe and his co-workers used his coincidence method in 1928–30 and concluded that energetic gamma rays are produced when polonium alpha particles bombard beryllium and other light nuclei. That stimulated Frédéric Joliot and Irène Curie to carry out related experiments. These experimental results were thoroughly discussed at a conference that Enrico Fermi organized in Rome in October 1931, whose proceedings included the first publication of Pauli’s neutrino hypothesis.

Hard X‐Rays and Gamma Rays from Type Ia Supernovae

1998 ◽  
Vol 492 (1) ◽  
pp. 228-245 ◽  
Author(s):  
P. Hoflich ◽  
J. C. Wheeler ◽  
A. Khokhlov
Keyword(s):  
Gamma Rays ◽  
Type Ia Supernovae ◽  
X Rays ◽  
Type Ia ◽  
Ia Supernovae

Diffuse 0.5–1 keV X‐Rays and Nuclear Gamma Rays from Fast Particles in the Local Hot Bubble

1999 ◽  
Vol 511 (1) ◽  
pp. 204-207 ◽  
Author(s):  
Vincent Tatischeff ◽  
Reuven Ramaty
Keyword(s):  
Gamma Rays ◽  
X Rays
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