Interaction of keV-Energy α-Particles with Glycyl–Leucine Molecules

2021 ◽  
Author(s):  
A. A. Basalaev ◽  
A. G. Buzykin ◽  
V. V. Kuz’michev ◽  
M. N. Panov ◽  
A. V. Petrov ◽  
...  
Keyword(s):  
Α Particles

Alignment of small He-Bubbles during in situ deformation of Al-foils

1978 ◽  
Vol 36 (1) ◽  
pp. 396-397
Author(s):  
E. Ruedl ◽  
P. Schiller
Keyword(s):  
Fusion Reactor ◽  
Matrix Material ◽  
Fusion Reactors ◽  
First Wall ◽  
Potential Matrix ◽  
In Situ Deformation ◽  
Α Particles ◽  
Metal Aluminium

The low Z metal aluminium is a potential matrix material for the first wall in fusion reactors. A drawback in the application of A1 is the rel= atively high amount of He produced in it under fusion reactor conditions. Knowledge about the behaviour of He during irradiation and deformation in Al, especially near the surface, is therefore important.Using the TEM we have studied Al disks of 3 mm diameter and 0.2 mm thickness, which were perforated at the centre by double jet polishing. These disks were bombarded at∽200°C to various doses with α-particles, impinging at any angle and energy up to 1.5 MeV at both surfaces. The details of the irradiations are described in Ref.1. Subsequent observation indicated that in such specimens uniformly distributed He-bubbles are formed near the surface in a layer several μm thick (Fig.1).After bombardment the disks were deformed at 20°C during observation by means of a tensile device in a Philips EM 300 microscope.

Formation of α clusters in dilute neutron-rich matter

Science ◽  
2021 ◽  
Vol 371 (6526) ◽  
pp. 260-264 ◽  
Author(s):  
Junki Tanaka ◽  
Zaihong Yang ◽  
Stefan Typel ◽  
Satoshi Adachi ◽  
Shiwei Bai ◽  
...  
Keyword(s):  
Cross Sections ◽  
Cluster Formation ◽  
Reaction Cross ◽  
Skin Thickness ◽  
Neutron Skin ◽  
Heavy Nuclei ◽  
Α Decay ◽  
Neutron Skin Thickness ◽  
Reaction Cross Sections ◽  
Α Particles

The surface of neutron-rich heavy nuclei, with a neutron skin created by excess neutrons, provides an important terrestrial model system to study dilute neutron-rich matter. By using quasi-free α cluster–knockout reactions, we obtained direct experimental evidence for the formation of α clusters at the surface of neutron-rich tin isotopes. The observed monotonous decrease of the reaction cross sections with increasing mass number, in excellent agreement with the theoretical prediction, implies a tight interplay between α-cluster formation and the neutron skin. This result, in turn, calls for a revision of the correlation between the neutron-skin thickness and the density dependence of the symmetry energy, which is essential for understanding neutron stars. Our result also provides a natural explanation for the origin of α particles in α decay.

scholarly journals Measuring the stopping power of α particles in compact bone for BNCT

2015 ◽  
Vol 583 ◽  
pp. 012047 ◽  
Author(s):  
L Provenzano ◽  
L M Rodríguez ◽  
D Fregenal ◽  
G Bernardi ◽  
C Olivares ◽  
...  
Keyword(s):  
Compact Bone ◽  
Stopping Power ◽  
Α Particles

Proportional counter with large thin windows for low energy α particles

1967 ◽  
Vol 48 (1) ◽  
pp. 56-60 ◽  
Author(s):  
J. Benn ◽  
H.H. Müller ◽  
H.H. Staub ◽  
H. Winkler
Keyword(s):  
Proportional Counter ◽  
Low Energy ◽  
Α Particles

The recoil characteristics of fission fragments produced by interaction of high-energy α-particles with heavy nuclei

1978 ◽  
Vol 46 (3) ◽  
pp. 488-494
Author(s):  
B. Grabež ◽  
Ž. Todorović ◽  
R. Antanasijević
Keyword(s):  
High Energy ◽  
Heavy Nuclei ◽  
Fission Fragments ◽  
Α Particles
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