scholarly journals A helium-based model for the effects of radiation damage annealing on helium diffusion kinetics in apatite

2017 ◽  
Vol 477 ◽  
pp. 195-204 ◽  
Author(s):  
Chelsea D. Willett ◽  
Matthew Fox ◽  
David L. Shuster
2021 ◽  
Vol 36 (16) ◽  
pp. 3239-3247
Author(s):  
A. Diver ◽  
O. Dicks ◽  
A. M. Elena ◽  
I. T. Todorov ◽  
T. Geisler ◽  
...  

AbstractWe report the effects of radiation damage on helium diffusion in zircon using data from molecular dynamics simulations. We observe an increase in activation energy for helium diffusion as a result of radiation damage and increasing structural disorder. The activation energy in a heavily damaged region is smaller than in a completely amorphous system which is correlated with remaining order in the cation sublattices of the damaged structure not present in the fully amorphized system. The increase in activation energy is related to the disappearance of fast diffusion pathways that are present in the crystal. Consistent with the change in activation energy, we observe the accumulation of helium atoms in the damaged structure and discuss the implications of this effect for the formation of helium bubbles and zircon’s performance as an encapsulation material for nuclear waste. Graphic abstract


2006 ◽  
Vol 249 (3-4) ◽  
pp. 148-161 ◽  
Author(s):  
David L. Shuster ◽  
Rebecca M. Flowers ◽  
Kenneth A. Farley

2017 ◽  
Vol 218 ◽  
pp. 308-322 ◽  
Author(s):  
Alyssa J. Anderson ◽  
Kip V. Hodges ◽  
Matthijs C. van Soest

2006 ◽  
Vol 70 (18) ◽  
pp. A590 ◽  
Author(s):  
D.L. Shuster ◽  
R.M. Flowers ◽  
K.A. Farley

Author(s):  
O. Sukhina ◽  
◽  
K. Nemaltsova ◽  
O. Panov ◽  
◽  
...  

Radiation therapy for malignant tumors of the female genital area, even with the use of modern radiotherapy equipment and dosimetric planning, causes the development of local radiation changes. An approach involving methods of general and local exposure is used in their treatment. One of the most promising directions is the creation of optimal combinations of medicines (in the form of ointments, gels, aerosols, suppositories, etc.), which have a therapeutic effect on the inflammatory process. The article reflects the clinical course and stage of occurrence of late radiation reactions of the skin, vaginal/cervix mucosa, bladder, and intestines, as well as the features of their treatment. Literary data and own practical experience in the treatment of radiation complications are presented. When reviewing the topic under study, it could be concluded that the leading cause of the development of local radiation damage is the errors in the planning and implementation of radiation therapy, when high absorbed doses that exceed the tolerance of healthy tissues are used. Another reason for this is the poor accounting for dose distribution of ionizing radiation in tissues, the presence of concomitant diseases in patients, and the underestimation of the long-term effects of radiation. Key words: female genital organs, radiation damage, radiodermatitis, radioepitheliitis, radiation rectitis, radiation cystitis.


Sign in / Sign up

Export Citation Format

Share Document