DSpace at VNU: Searching for photonuclear reaction on natural Ti with 65 MeV bremsstrahlung

VNU JOURNAL OF SCIENCE, Mathematics - Physics, T.XXII, N04 , 20 06 SE A R C H IN G F O R P H O T O N U C L E A R R E A C T IO N O N N A T U R A L Ti W IT H M E V B R E M S S T R A H L U N G N g u y e n T rung T in h College o f Science, V N U A b stra ct Photonuclear reactions formed via the irradiation of bremsstrahlung beam with end-point energy of 65 MeV from LINAC (Pohang, Korea) are presented E x p e r im e n t W ith h igh e n erg y beam from accelerator, m a n y rea ctio n s a p p e a r; th is is a very good chance for p rodu ce rad io activ e isotopes In th is p a p e r, som e p h otonu clear reactions form ed via th e ir r a d ia tio n of b r e m s s tr a h lu n g b eam from LINAC (PohangKorea) are p re s e n te d 1.1 I r r a d ia t io n The 65 MeV b r e m s s tr a h lu n g w ere produced by b o m b a rd in g electron beam (accelerated up to 65 MeV) in to T u n g s te n ta r g e t (W) T h is b r e m s s tr a h lu n g beam was used to i r r a d i a t e a T i pow der The T i pow der sa m p le w as tain ed in a cylinder w ith h = m m , d = 10 mm A sch em atic d ia g m of th e e x p e rim e n ta l set-up is showed in Fig F ig.l A sc h e m a tic d ia g m of th e e x p e rim e n t a t LINAC, P o h a n g The T O po w der w a s ir r a d ia te d for 2.0 h w ith 65 MeV b r e m s s tr a h lu n g beam and pulse electro n b e a m w a s 40 mA T he sam p le w a s fixed a t one position 29 N guyen Trung Tinh 30 1.2 M easurem ent - The decay tim e of irra d ia te d sam ple was from to 60 h o u rs - M easu rin g tim e v aried from 60 seconds up to 10 hours - G am m a sp ectra w ere analysed by using gam m a vision p ro g ram The irra d ia te d sam ple was m ea rsu red for 30 tim es, the following photopeaks in keV were found in the photonuclear reactions for T i (Table 1) T a b l e The photopeaks in photonuclear reactions for T i NET, counts Error, ± CENTROID, keV 1853597 352091 2758 54.54 70.70 79.44 836728 7125 1343 74.28 95.48 104.23 1161559 44717 1569 99.61 137.27 146.02 1477632 29363 1779 141.73 149.91 164.00 15936873 13850248 4711 159.63 166.91 180.03 1347746 232305 2079 175.53 216.96 225.71 686634 3128 1218 221.27 267.01 275.75 697042 67160 1196 271.63 314.62 323.37 718894 2952 1246 318.70 10 369.04 377.78 432011 86794 913 373.21 11 392.84 401.59 270861 8430 759 397.36 12 473.48 482.23 208231 8569 664 478.07 13 491.45 496.80 160825 1027 401 494.88 14 507.00 515.74 7242364 6018612 2944 511.51 15 560.43 569.17 107409 4489 476 564.57 16 589.57 598.31 108647 5395 478 593.85 17 613.37 622.11 141882 36673 514 618.00 18 716.33 725.07 113340 4749 489 720.71 19 885.32 894.06 159307 70925 512 889.69 20 904.74 913.48 88875 3837 433 909.45 21 930.47 939.21 103112 19743 447 934.85 22 979.51 988.25 496129 416443 767 984.03 23 1017.86 1026.60 54845 1316 342 1021.97 24 1033.89 1042.62 454850 390940 727 1038.08 25 1080.00 1088.74 41880 -202 301 1084.55 26 1117.87 1124.66 83062 53787 312 1121.08 Number, ROI-RANGE( keV) 46.40 62.92 GROSS, counts Searchin g fo r P h o to n u c le a r Reaction on 31 27 1127.09 1133.40 28262 6196 188 1129.73 28 1152.82 1161.56 539954 486770 775 1157.46 29 1209.12 1217.86 20262 8846 183 1213.27 30 1293.09 1299.89 10202 517 122 1297.20 31 1301.83 1319.78 370635 349260 680 1312.37 32 1364.43 1373.17 4912 425 100 1369.11 33 1404.23 1412.96 5664 1471 102 1409.03 34 1456.64 1465.37 4685 1056 94 1460.99 35 1467.80 1474.59 2869 189 64 1471.00 36 1483.32 1492.06 3535 321 85 1487.70 37 1494.97 1503.70 6675 3502 101 1499.64 38 1520.20 1528.93 11990 9054 124 1524.79 39 1657.02 1671.09 8504 3684 151 1667.61 40 1726.40 1734.16 1216 40 46 1730.97 41 1739.01 1748.71 1484 42 60 1746.28 42 1761.81 1767.14 916 96 30 1763.98 43 1803.52 1813.23 1835 375 63 1807.69 44 1842.81 1850.58 1076 87 43 1846.88 45 1956.31 1964.07 1535 178 51 1960.68 £*• â c q u tr v Cmầtirtm aglM J Catautm/tm n a JX[ Ari "tz A LĨdi l ỉ « VÉ OM IfuS A I i' 0.01 QiBoUy Ĩ 21:2ft4Ở /0 /2 0 Lb*m 3600(100 FlMt 7 BB D ««ct 67 « - no I— " f*— - —I j jS U i r P m Ic -“1 *.1 _!r*sJ jgjj Mi) f jl E G Ị Q O R T C C I L w * d pra^r 1640 ygtg-ọsr-" ~yrj&srissr I A n é V m C o fn p M « d # » E : \ cwc«f A n a M j # w r x V \ T n h \ T a U l o ẼKpSỊI IỊwmmmI w 10 24 48 » /2 0 I rL i., Fig G a m m a sp e c tru m of 44Sc m easured by G am m avision S pectrom eter R e su lts a n d d is c u s s i o n A fter a n a ly s in g all the m earsu red spectra and com paring the analysised d a ta w ith the d a ta of rad io isotopes, the following reactions were found: Nguyen Trung Tinh 32 Ti(y,n) {for T i46} Ti(y,2n) { for T i47} ti(y,p) { for T i47, Ti48, Ti49, Ti50}-> Sc fi(y,2p) { for T i49} -> C a47 fi(Y,pn) { for Ti46, T i48, Ti49, Ti50} -> Sc fi(y,ap) { for Ti47, Ti48, Ti49, Ti50} -> K The d a ta is su itab le w ith the reference d a ta This re s u lt can be used for: N uclear d a ta (Cross-section) N uclear s tru c tu re N u clear a nalysis Radioisotope production R efe re n ce s Boston M., E r d u n M N ,Sirin M an d S u b a st M., Physical Review, 2, (1997) Kolev D., A ppl R adiati Isot, 8, (1998) Kolev D., Dobva E., Nenov N an d Todorov V., N uclear instrum ents and m ethods in p hysic reseach, 356, (1995) A dnan A Shihab-E ldin, Leslie J J a r d in e , Ja g d ish K.Tuli, Andrey B.Buyrn Table o f Isotopes, U n iv e rs ity of California, Berkele, 1978  ... following reactions were found: Nguyen Trung Tinh 32 Ti( y,n) {for T i46} Ti( y,2n) { for T i47} ti( y,p) { for T i47, Ti4 8, Ti4 9, Ti5 0}-> Sc fi(y,2p) { for T i49} -> C a47 fi(Y,pn) { for Ti4 6, T i48, Ti4 9,... analysed by using gam m a vision p ro g ram The irra d ia te d sam ple was m ea rsu red for 30 tim es, the following photopeaks in keV were found in the photonuclear reactions for T i (Table 1) T a b... i48, Ti4 9, Ti5 0} -> Sc fi(y,ap) { for Ti4 7, Ti4 8, Ti4 9, Ti5 0} -> K The d a ta is su itab le w ith the reference d a ta This re s u lt can be used for: N uclear d a ta (Cross-section) N uclear