Neutron activation of various materials at the height of commercial flight.
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Accession number;01A0231217
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| Title;Neutron activation of various materials at the height of commercial flight. |
| Author;
KOMURA KAZUHISA
(Low Lev. Radioact. Lab., Kanazawa Univ.)
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Journal Title;Abstracts of Papers. Symposium on Radiochemistry
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Journal Code:F0139B
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ISSN:1345-2762
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VOL.44th;NO.;PAGE.60(2000)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Neutron activation at the height of domestic and international flight has been investigated using various target materials such as metallic powder and chemical reagents. The samples exposed to cosmic ray neutrons were transported to Ogoya underground laboratory as soon as possible after landing and measured by using extremely low background Ge detectors. By the domestic flight, very short lived 116mIn and 56Mn were successfully detected though peak area were extremely low. On the other hand by international flights, more 10 short-lived nuclides could be added to the list of neutron-induced natural radionuclides: 24Na, 82Br, 140La, 152mEu, 175Yb, 187W, 186Re, 188Re, 192Ir and 194Ir. These nuclides are considered to be very useful to get information of cosmic-ray neutrons and to evaluate neutron exposure during flight. (author abst.) |
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