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EHFHGHKHJ ijbq_f k [hevrbfb
kbkl_fZlbq_kdbfb ih]j_rghklyfb ^ey ihemq_gby [hevrbgkl\Z k_q_gbc lj_og_cljhgguo
j_Zdpbc bkihevah\Zehkv khhlghr_gb_ σ eval (γ,3n) = 1/3[σ(γ,xn) - (γ,n) -
2σ(γ,2n@Hghihemq_ghgZhkgh\Zgbbk\yab\h[eZklb=>Jj_ZdpbcjZaebqghcfgh`_
kl\_gghklbγ,xn) = (γ,n) + 2(γ,2n) + 3(γ,3nIjh\_^_ggucZgZebaiheghklvxih^l\_j^be
ijZ\bevghklvijhp_^mjubkihevah\Zgghc\>@ σ eval (γ,3nkh]eZkmxlkykwdki_jbf_g
lZevgufb^ZggufbEb\_jfhjZ^eyj_Zdpbbγ,3n\kemqZ_^ZgguoKZde_hlghkbl_ev
gh_kh]eZkb_^hklb]Z_lkyebrvijbbkihevah\Zgbbij_^\Zjbl_evghkdhjj_dlbjh\Zgguo
>@^ZgguoKZde_^eyj_Zdpbc(γ,xn), (γQbγ,2n).
GZhkgh\Zgbb\uiheg_ggh]hZgZebaZ\^ZgghcjZ[hl_[uebihemq_guhp_g_g
gu_\aZbfghkh]eZkh\Zggu_^Zggu_ihk_q_gbyfj_ZdpbcγQ^eyy^_j 117 Sn, 118 Sn,
119 Sn, 124 Sn, 127 I, 133 Cs, 159 Tb, 165 Ho, 181 Ta, 197 Au, 208 3Ebijh\_^_ghkjZ\g_gb_ihemq_gguo
j_amevlZlh\ k _^bgkl\_ggh ^hklmigufb ^Zggufb ih j_Zdpbb 181 Ta(γ,3n) 178 7D \uihe
g_ggufb\wdki_jbf_glZobgh]hlbiZ–gZimqdZolhjfhagh]hγ-baemq_gbyijbbkihev
ah\Zgbbf_lh^ZgZ\_^_gghcZdlb\ghklb>@
JZ[hlZqZklbqghih^^_j`b\Z_lky]jZglZfbIj_ab^_glZJhkkbb‹SS-ZlZd`_ JNNB‹
03-07-b‹ 04-02-16275.
1. Fuller E.G., Gerstenberg H. Photonuclear Data - Abstracts Sheets 1955 - 1982. NBSIR
83-2742. U.S.A. National Bureau of Standards, 1983.
2.