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Report No.

Neutron angular distribution for ($$gamma$$, n) reactions with linear polarized photons

Hayakawa, Takehito; Miyamoto, Shuji*; Horikawa, Ken*; Mochizuki, Takayasu*; Amano, So*; Li, D.*; Imasaki, Kazuo*; Izawa, Yasukazu*; Chiba, Satoshi*; Ogata, Kazuyuki*

It was predicted in 1950's that the neutron angular distribution in ($$gamma$$,n) reactions with a 100% linearly polarized $$gamma$$-ray beam for dipole excitation should be anisotropic and universally described by the simple function of a + b$$cdot$$cos($${2}{phi}$$) at polar angle $$theta$$ = 90$$^{circ}$$, where $$phi$$ is the azimuthal angle,but it has not been experimentally confirmed over half a century. We have verified experimentally this angular distribution on three targets using linearly polarized laser Compton scattering $$gamma$$-rays at NewSUBARU.



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