oon ee a. wae ee . ( oo ae elaR arial ade . ) te o 7 aero 8 ape cae _ oteRaeeselere . tone eee ES ee EEepee a Me tS ar ti ne eee eere a ee ee se “im we no : fe we - Oe -- + S . Although most of a . oe fea alee S - - ot . i = aes ioe fw. . “~ aw me - Py sae Mate ae: ‘products, such ass 1370s (30 years),.>?55> k2. 7 years),oe vation products such as 54Mn (303 days),and88zn (2455 aya) bla eee, sn cae wwe ate other isotopes such as 82C0, 1°3Meh, 2°7Bi, 1623u, and 3*8ny are only rarely identified in environmental samples, particus= larly with such prominence as that displayed, for instance, by the 7 intense lines of ?°?™Rh identifiable in Figure 4. The appearance of 12 distinct lines of 175Sb in the soil semple spectrum in Fig. 3 is also quite unusual. ?/5*Eu (12.7 years), an apparent activation product, has been found previously (5) in Trinitite, an artifical mineral produced in the first nuclear explosion in New Mexico in 1945. 2° Rh (3 years) and 2°#Rh (206 days) are also activation products: 1°2Rh is known to have beenusedas a tracer material in several weapons tests. | Allbut.‘he least intense gamma-ray “ wenn ‘eee oe aaa ete ue er res lines from ‘4° 20Rh can be identifeein Fig.ay“the first| time as faras“we knowthat this“recently discovered 1 isomer32 ms a vn MERZ aeeeerras a gage aT ie. Sr TO “5. (7, fe has been identified in-an environmental sample (6). Soba tt SiRnto le oe ea ty a SaeetPenge aaa tee oa . . . wot seaee TDM Tanne, oe Te 7 Vee wa + é + oo ¥ - Ss: MROPF otae cence to cations hep acgeT - n amene kt settling ee : we —_——a she ree : aie tipi SRae tea ee ab em aes : . yates o ry x gf. SNe Ee * ed taean dir meme thieHe ne veeee DP pttwer 7 awe oe . . oe oe nate . ae gh ee te. . 7 Se as ee Pe ree mR eR Siege tte, i. Jae = oe the isotopes identified‘are ‘familiar long-lived fission - eae © f at oP ae en 133Ba in a soil sample from Nan Island. at oe oa ae =: