ENTRY A0456 20240909 A117A0456 0 1 SUBENT A0456001 20240909 A117A0456 1 1 BIB 11 40 A0456 1 2 TITLE Pre-equilibrium particle emission in alpha-induced A0456 1 3 excitation functions in niobium A0456 1 4 AUTHOR (R.K.Y.Singh, M.Afzal Ansari, R.P.Gautam) A0456 1 5 REFERENCE (J,CHP,39,336,2001) A0456 1 6 INSTITUTE (3INDMUA) A0456 1 7 (3INDIND) Janta College, Bakewar, India A0456 1 8 (3INDIND) Thoubal College, Thoubal, India A0456 1 9 FACILITY (ISOCY,3INDVEC) Variable energy cyclotron A0456 1 10 SAMPLE Spectroscopically pure natural niobium metallic foils A0456 1 11 of thickness 10.69 mg/cm2 were used for A0456 1 12 investigation. A0456 1 13 The stack was comprised of fifteen niobium foils A0456 1 14 interspersed with aluminium foils of thicknesses A0456 1 15 6.75 mg/cm2 and 3.83 mg/cm2, which served as energy A0456 1 16 degraders, to get the desired alpha-particle energy A0456 1 17 incident on the individual target foil. A0456 1 18 METHOD (STTA) A0456 1 19 (EXTB) The cooled stack was irradiated with a diffused A0456 1 20 alpha-particle beam of energy 39 MeV. By using a A0456 1 21 tantalum collimator placed in front of the stack the A0456 1 22 diameter of the beam spot was adjusted to 8 mm. A0456 1 23 (BCINT) A0456 1 24 (ACTIV) By collimated alpha particle beam of about A0456 1 25 100 nanoAmpere A0456 1 26 (GSPEC) The dead time for counting was kept to less A0456 1 27 than 10% by adjusting the sample detector separation inA0456 1 28 these measurements. A0456 1 29 DETECTOR (GELI) High resolution (FWHM 2 keV at 1.33 MeV) 100 cm3A0456 1 30 ADD-RES (COMP) Measured excitation functions are compared with A0456 1 31 pre-equilibrium geometry dependent hybrid model A0456 1 32 calculations. It has been found that the initial A0456 1 33 exciton number N0 = 4 gives a satisfactory reproductionA0456 1 34 of the experimental data. A0456 1 35 STATUS (CURVE) By CAJAD A0456 1 36 The request for numeric data has been sent to A0456 1 37 M.Afzal Ansari. No reply was received. A0456 1 38 HISTORY (20030212C) A0456 1 39 (20030714U) Last checking has been done. A0456 1 40 (20200226U) SD: Small corrections in all Subents. A0456 1 41 (20240909A) SD: Corrections in all Subents. A0456 1 42 ENDBIB 40 0 A0456 1 43 NOCOMMON 0 0 A0456 1 44 ENDSUBENT 43 0 A0456 199999 SUBENT A0456002 20240909 A117A0456 2 1 BIB 6 18 A0456 2 2 REACTION (41-NB-93(A,N)43-TC-96-G,M+,SIG) A0456 2 3 REL-REF (D,C0718001,T.Matsuo+,J,PR,139,B886,1965) A0456 2 4 (D,,C.L.Branquinho+,J,JIN,41,617,1979) A0456 2 5 (D,,J.Ernst+,J,ZP/A,308,301,1982) A0456 2 6 (D,A0531001,S.Mukherjee+,J,PRM,41,329,1993) A0456 2 7 (D,C0185001,P.H.Stelson+,J,PR,133,B911,1964) A0456 2 8 (A,C2343001,P.Bond+,J,PR/C,2,1887,1970) A0456 2 9 DECAY-DATA (43-TC-96-G,4.35D,DG,778.,0.991, A0456 2 10 DG,812.,0.815, A0456 2 11 DG,850.,0.965, A0456 2 12 DG,1127.,0.151) A0456 2 13 (43-TC-96-M,51.5MIN) 98% isomer transition. A0456 2 14 COMMENT - By authors. The activities were measured after the A0456 2 15 decay of the metastable state. A0456 2 16 STATUS (CURVE,,R.K.Y.Singh+,J,CHP,39,336,2001) Fig.1 A0456 2 17 Tabulated energy values from the text on p.337. A0456 2 18 HISTORY (20200226U) SD: ERR-ANALYS deleted. DATA-ERR -> ERR-DIGA0456 2 19 (20240909U) SD: STATUS updated. A0456 2 20 ENDBIB 18 0 A0456 2 21 COMMON 1 3 A0456 2 22 ERR-DIG A0456 2 23 PER-CENT A0456 2 24 3. A0456 2 25 ENDCOMMON 3 0 A0456 2 26 DATA 3 15 A0456 2 27 EN EN-ERR DATA A0456 2 28 MEV MEV MB A0456 2 29 7.0 2.4 0.736 A0456 2 30 9.9 2.1 25.2 A0456 2 31 12.3 1.8 142. A0456 2 32 14.4 1.7 256. A0456 2 33 16.4 1.6 356. A0456 2 34 18.2 1.5 246. A0456 2 35 19.9 1.4 147. A0456 2 36 22.4 1.4 70.3 A0456 2 37 24.6 1.3 37.6 A0456 2 38 27.2 1.3 22.3 A0456 2 39 29.7 1.2 16. A0456 2 40 32.1 1.1 12. A0456 2 41 34.3 1.1 9.64 A0456 2 42 36.4 1.1 7.4 A0456 2 43 38.5 1.0 5.44 A0456 2 44 ENDDATA 17 0 A0456 2 45 ENDSUBENT 44 0 A0456 299999 SUBENT A0456003 20240909 A117A0456 3 1 BIB 6 20 A0456 3 2 REACTION (41-NB-93(A,2N)43-TC-95-G,,SIG) A0456 3 3 REL-REF (D,,C.L.Branquinho+,J,JIN,41,617,1979) A0456 3 4 (D,A0531001,S.Mukherjee+,J,PRM,41,329,1993) A0456 3 5 (A,C2343001,P.Bond+,J,PR/C,2,1887,1970) A0456 3 6 DECAY-DATA (43-TC-95-G,20.HR,DG,948.,0.021, A0456 3 7 DG,1074.,0.042) A0456 3 8 (43-TC-95-M,61.D,DG,582.,0.325, A0456 3 9 DG,835.,0.281) 3.9% isomer transition,A0456 3 10 95.8% electron capture, 0.3% beta+ decay. A0456 3 11 COMMENT - By compiler. A0456 3 12 1. It is unclear, what cross sections are shown on A0456 3 13 figure 2. Was isomer production cross section included A0456 3 14 in published data? A0456 3 15 2. The paper text contains phrase: " the cross-section A0456 3 16 was measured at eleven alpha-particle energies", but A0456 3 17 only 10 data points are shown on figure 2. A0456 3 18 STATUS (CURVE,,R.K.Y.Singh+,J,CHP,39,336,2001) Fig.2 A0456 3 19 Tabulated energy values from the text on p.337. A0456 3 20 HISTORY (20200226U) SD: ERR-ANALYS deleted. DATA-ERR -> ERR-DIGA0456 3 21 (20240909U) SD: STATUS updated. A0456 3 22 ENDBIB 20 0 A0456 3 23 COMMON 1 3 A0456 3 24 ERR-DIG A0456 3 25 PER-CENT A0456 3 26 2.6 A0456 3 27 ENDCOMMON 3 0 A0456 3 28 DATA 3 10 A0456 3 29 EN EN-ERR DATA A0456 3 30 MEV MEV MB A0456 3 31 16.4 1.6 136. A0456 3 32 18.2 1.5 294. A0456 3 33 19.9 1.4 480. A0456 3 34 22.4 1.4 609. A0456 3 35 24.6 1.3 669. A0456 3 36 29.7 1.2 550. A0456 3 37 32.1 1.1 392. A0456 3 38 34.3 1.1 313. A0456 3 39 36.4 1.1 182. A0456 3 40 38.5 1. 73.9 A0456 3 41 ENDDATA 12 0 A0456 3 42 ENDSUBENT 41 0 A0456 399999 SUBENT A0456004 20240909 A117A0456 4 1 BIB 5 11 A0456 4 2 REACTION (41-NB-93(A,2N)43-TC-95-M/G,,SIG/RAT) A0456 4 3 REL-REF (D,C0718001,T.Matsuo+,J,PR,139,B886,1965) A0456 4 4 (A,,C.L.Branquinho+,J,JIN,41,617,1979) A0456 4 5 DECAY-DATA (43-TC-95-G,20.HR,DG,948.,0.021, A0456 4 6 DG,1074.,0.042) A0456 4 7 (43-TC-95-M,62.D,DG,582.,0.325, A0456 4 8 DG,835.,0.281) A0456 4 9 STATUS (CURVE,,R.K.Y.Singh+,J,CHP,39,336,2001) Fig.3 A0456 4 10 Tabulated energy values from the text on p.337. A0456 4 11 HISTORY (20200226U) SD: ERR-ANALYS deleted. A0456 4 12 (20240909U) SD: DATA-ERR -> ERR-DIG. STATUS updated. A0456 4 13 ENDBIB 11 0 A0456 4 14 COMMON 1 3 A0456 4 15 ERR-DIG A0456 4 16 NO-DIM A0456 4 17 0.003 A0456 4 18 ENDCOMMON 3 0 A0456 4 19 DATA 3 11 A0456 4 20 EN EN-ERR DATA A0456 4 21 MEV MEV NO-DIM A0456 4 22 16.4 1.6 0.148 A0456 4 23 18.2 1.5 0.106 A0456 4 24 19.9 1.4 0.098 A0456 4 25 22.4 1.4 0.129 A0456 4 26 24.6 1.3 0.096 A0456 4 27 27.2 1.3 0.076 A0456 4 28 29.7 1.2 0.065 A0456 4 29 32.1 1.1 0.044 A0456 4 30 34.3 1.1 0.066 A0456 4 31 36.4 1.1 0.048 A0456 4 32 38.5 1. 0.138 A0456 4 33 ENDDATA 13 0 A0456 4 34 ENDSUBENT 33 0 A0456 499999 SUBENT A0456005 20240909 A117A0456 5 1 BIB 7 41 A0456 5 2 REACTION (41-NB-93(A,3N)43-TC-94-G,,SIG) A0456 5 3 REL-REF (A,C0718016,T.Matsuo+,J,PR,139,B886,1965) A0456 5 4 (A,D0143005,J.Ernst+,J,ZP/A,308,301,1982) A0456 5 5 (D,A0531004,S.Mukherjee+,J,PRM,41,329,1993) A0456 5 6 (A,C2343001,P.Bond+,J,PR/C,2,1887,1970) A0456 5 7 (D,P0103001,J.M.Matuszek Jr+,J,NP,42,582,1963) A0456 5 8 DECAY-DATA (43-TC-94-G,4.88HR,DG,702.,0.998, A0456 5 9 DG,871.,1., A0456 5 10 DG,916.,0.074) A0456 5 11 COMMENT - By compiler. The probability of isomer transition to A0456 5 12 ground state is very low (<0.1%). A0456 5 13 -By compiler. The angle between X and Y axes A0456 5 14 on this figure is not equal 90 angular degrees. A0456 5 15 This deviation is 2.28E-02 radians. A0456 5 16 -By authors. In this reaction two isomers of 94Tc are A0456 5 17 produced. The ground and metastable states have A0456 5 18 half-lives of 4.88 H and 52.5 minutes respectively. A0456 5 19 The ground state isomer gives four major gamma-rays: A0456 5 20 0.702, 0.850, 0.871 and 0.916 MeV. The 0.850 MeV A0456 5 21 gamma-ray is in common with Tc-96-g, produced in the A0456 5 22 (alpha,n) reaction whereas the 0.871 MeV gamma-ray is A0456 5 23 also obtained from Tc-94-m. The 0.871 MeV gamma ray A0456 5 24 was also used in the analysis of the cross-section A0456 5 25 corresponding to the ground state by counting the A0456 5 26 activity, after the decay of several half-lives of the A0456 5 27 metastable state. The 0.916 MeV gamma-ray overlaps A0456 5 28 with the 0.913 MeV gamma-rays, emitted from Nb-92-m, A0456 5 29 produced in the (a,a+n) reaction. The absolute A0456 5 30 intensity of the latter gamma ray is 1.6% and the crossA0456 5 31 sections for the (a,a+n) reaction in the energy range A0456 5 32 of our interest is small. Therefore, the 0.913 MeV A0456 5 33 gamma ray has negligible contribution to the photopeak A0456 5 34 counts of the 0.916 MeV gamma ray. Thus the cross A0456 5 35 sections of the 93Nb(a,3n) reaction were measured by A0456 5 36 considering the 0.702, 0.871 and 0.916 MeV gamma-rays. A0456 5 37 ERR-ANALYS (DATA-ERR) No information about source of uncertainty A0456 5 38 STATUS (CURVE,,R.K.Y.Singh+,J,CHP,39,336,2001) Fig.4 A0456 5 39 Tabulated energy values from the text on p.337. A0456 5 40 HISTORY (20200226U) SD: ERR-ANALYS updated. DATA-ERR -> ERR-DIGA0456 5 41 REL-REF corrected. ERR-T -> DATA-ERR. A0456 5 42 (20240909U) SD: STATUS updated. A0456 5 43 ENDBIB 41 0 A0456 5 44 COMMON 1 3 A0456 5 45 ERR-DIG A0456 5 46 PER-CENT A0456 5 47 2.3 A0456 5 48 ENDCOMMON 3 0 A0456 5 49 DATA 4 7 A0456 5 50 EN EN-ERR DATA DATA-ERR A0456 5 51 MEV MEV MB PER-CENT A0456 5 52 24.6 1.3 0.27 40. A0456 5 53 27.2 1.3 10.25 A0456 5 54 29.7 1.2 92.4 A0456 5 55 32.1 1.1 236. A0456 5 56 34.3 1.1 379. A0456 5 57 36.4 1.1 474. A0456 5 58 38.5 1.0 479. A0456 5 59 ENDDATA 9 0 A0456 5 60 ENDSUBENT 59 0 A0456 599999 SUBENT A0456006 20240909 A117A0456 6 1 BIB 5 8 A0456 6 2 REACTION (41-NB-93(A,X)41-NB-92-M,,SIG) A0456 6 3 REL-REF (D,A0531001,S.Mukherjee+,J,PRM,41,329,1993) A0456 6 4 (A,C2343001,P.Bond+,J,PR/C,2,1887,1970) A0456 6 5 DECAY-DATA (41-NB-92-M,10.14D,DG,936.,0.992) A0456 6 6 STATUS (CURVE,,R.K.Y.Singh+,J,CHP,39,336,2001) Fig.5 A0456 6 7 Tabulated energy values from the text on p.337 A0456 6 8 HISTORY (20200226U) SD: ERR-ANALYS deleted. DATA-ERR -> ERR-DIGA0456 6 9 (20240909U) SD: STATUS updated. A0456 6 10 ENDBIB 8 0 A0456 6 11 COMMON 1 3 A0456 6 12 ERR-DIG A0456 6 13 PER-CENT A0456 6 14 2.6 A0456 6 15 ENDCOMMON 3 0 A0456 6 16 DATA 3 8 A0456 6 17 EN EN-ERR DATA A0456 6 18 MEV MEV MB A0456 6 19 22.4 1.4 2.28 A0456 6 20 24.6 1.3 3.36 A0456 6 21 27.2 1.3 5.89 A0456 6 22 29.7 1.2 8.22 A0456 6 23 32.1 1.1 8.78 A0456 6 24 34.3 1.1 9.55 A0456 6 25 36.4 1.1 8.71 A0456 6 26 38.5 1.0 8.22 A0456 6 27 ENDDATA 10 0 A0456 6 28 ENDSUBENT 27 0 A0456 699999 ENDENTRY 6 0 A045699999999