SPECTRAL VARIATION OF PRIMARY COSMIC RAYS DURING FORBUSH DECREASES
Journal Article
·
· Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B
Variations of primary cosmic ray rigidity spectrum occurring at typical Forbush decreases in the geomagnetically sensitive range are studied. Selected events are grouped in two classes according to the degree of associated geomagnetic perturbation. It is shown that the systematic differences between the two classes, arising when spectral variation is derived from the latitude effect of the amplitude of nucleonic intensity decrease, do practically vanish when tests independent of any variation on the geomagnetic field are applied. For events of the geomagnetically quiet group an inverse power law delta D(R)/ D(R) = -BR/sup -k/ with an exponent k lower than unity is found to approximate well all the analyzed experimental data. (auth)
- Research Organization:
- Universita, Rome and Istituto Nazionale di Fisica Nucleare, Rome
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-016930
- OSTI ID:
- 4743830
- Journal Information:
- Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B, Journal Name: Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B Vol. Vol: (10), 27; ISSN NUCIA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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