id sid tid token lemma pos jd472v2793h 1 1 studies study NOUN jd472v2793h 1 2 and and CCONJ jd472v2793h 1 3 subsequent subsequent ADJ jd472v2793h 1 4 analysis analysis NOUN jd472v2793h 1 5 of of ADP jd472v2793h 1 6 meteoritic meteoritic ADJ jd472v2793h 1 7 material material NOUN jd472v2793h 1 8 has have AUX jd472v2793h 1 9 provided provide VERB jd472v2793h 1 10 evidence evidence NOUN jd472v2793h 1 11 of of ADP jd472v2793h 1 12 the the DET jd472v2793h 1 13 presence presence NOUN jd472v2793h 1 14 of of ADP jd472v2793h 1 15 several several ADJ jd472v2793h 1 16 short short ADV jd472v2793h 1 17 - - PUNCT jd472v2793h 1 18 lived live VERB jd472v2793h 1 19 radionuclides radionuclide NOUN jd472v2793h 1 20 ( ( PUNCT jd472v2793h 1 21 slrs slrs NOUN jd472v2793h 1 22 ) ) PUNCT jd472v2793h 1 23 at at ADP jd472v2793h 1 24 the the DET jd472v2793h 1 25 formation formation NOUN jd472v2793h 1 26 of of ADP jd472v2793h 1 27 the the DET jd472v2793h 1 28 solar solar ADJ jd472v2793h 1 29 system system NOUN jd472v2793h 1 30 . . PUNCT jd472v2793h 2 1 these these DET jd472v2793h 2 2 slrs slrs NOUN jd472v2793h 2 3 , , PUNCT jd472v2793h 2 4 named name VERB jd472v2793h 2 5 for for ADP jd472v2793h 2 6 their their PRON jd472v2793h 2 7 half half ADJ jd472v2793h 2 8 - - PUNCT jd472v2793h 2 9 lives life NOUN jd472v2793h 2 10 being be AUX jd472v2793h 2 11 less less ADJ jd472v2793h 2 12 than than ADP jd472v2793h 2 13 100 100 NUM jd472v2793h 2 14 myr myr NOUN jd472v2793h 2 15 and and CCONJ jd472v2793h 2 16 therefore therefore ADV jd472v2793h 2 17 " " PUNCT jd472v2793h 2 18 short short ADJ jd472v2793h 2 19 " " PUNCT jd472v2793h 2 20 in in ADP jd472v2793h 2 21 terms term NOUN jd472v2793h 2 22 of of ADP jd472v2793h 2 23 the the DET jd472v2793h 2 24 age age NOUN jd472v2793h 2 25 of of ADP jd472v2793h 2 26 the the DET jd472v2793h 2 27 solar solar ADJ jd472v2793h 2 28 system system NOUN jd472v2793h 2 29 , , PUNCT jd472v2793h 2 30 are be AUX jd472v2793h 2 31 key key ADJ jd472v2793h 2 32 to to ADP jd472v2793h 2 33 the the DET jd472v2793h 2 34 understanding understanding NOUN jd472v2793h 2 35 of of ADP jd472v2793h 2 36 the the DET jd472v2793h 2 37 types type NOUN jd472v2793h 2 38 of of ADP jd472v2793h 2 39 processes process NOUN jd472v2793h 2 40 that that PRON jd472v2793h 2 41 created create VERB jd472v2793h 2 42 the the DET jd472v2793h 2 43 solar solar ADJ jd472v2793h 2 44 system system NOUN jd472v2793h 2 45 . . PUNCT jd472v2793h 3 1 production production NOUN jd472v2793h 3 2 models model NOUN jd472v2793h 3 3 rely rely VERB jd472v2793h 3 4 on on ADP jd472v2793h 3 5 theoretical theoretical ADJ jd472v2793h 3 6 nuclear nuclear ADJ jd472v2793h 3 7 models model NOUN jd472v2793h 3 8 , , PUNCT jd472v2793h 3 9 but but CCONJ jd472v2793h 3 10 theoretical theoretical ADJ jd472v2793h 3 11 reaction reaction NOUN jd472v2793h 3 12 cross cross NOUN jd472v2793h 3 13 sections section NOUN jd472v2793h 3 14 can can AUX jd472v2793h 3 15 be be AUX jd472v2793h 3 16 imprecise imprecise ADJ jd472v2793h 3 17 , , PUNCT jd472v2793h 3 18 making make VERB jd472v2793h 3 19 experimental experimental ADJ jd472v2793h 3 20 measurements measurement NOUN jd472v2793h 3 21 crucial crucial ADJ jd472v2793h 3 22 to to ADP jd472v2793h 3 23 relieving relieve VERB jd472v2793h 3 24 some some DET jd472v2793h 3 25 uncertainties uncertainty NOUN jd472v2793h 3 26 on on ADP jd472v2793h 3 27 theoretical theoretical ADJ jd472v2793h 3 28 models model NOUN jd472v2793h 3 29 . . PUNCT jd472v2793h 4 1 in in ADP jd472v2793h 4 2 particular particular ADJ jd472v2793h 4 3 , , PUNCT jd472v2793h 4 4 41ca 41ca ADJ jd472v2793h 4 5 is be AUX jd472v2793h 4 6 important important ADJ jd472v2793h 4 7 as as SCONJ jd472v2793h 4 8 its its PRON jd472v2793h 4 9 half half ADJ jd472v2793h 4 10 - - PUNCT jd472v2793h 4 11 life life NOUN jd472v2793h 4 12 ( ( PUNCT jd472v2793h 4 13 t1/2= t1/2= ADP jd472v2793h 4 14 9.94 9.94 NUM jd472v2793h 4 15 x x SYM jd472v2793h 4 16 104 104 NUM jd472v2793h 4 17 yrs yrs PROPN jd472v2793h 4 18 ) ) PUNCT jd472v2793h 4 19 is be AUX jd472v2793h 4 20 much much ADV jd472v2793h 4 21 shorter short ADJ jd472v2793h 4 22 than than ADP jd472v2793h 4 23 other other ADJ jd472v2793h 4 24 slrs slrs NOUN jd472v2793h 4 25 , , PUNCT jd472v2793h 4 26 thereby thereby ADV jd472v2793h 4 27 offering offer VERB jd472v2793h 4 28 stricter strict ADJ jd472v2793h 4 29 constraints constraint NOUN jd472v2793h 4 30 on on ADP jd472v2793h 4 31 the the DET jd472v2793h 4 32 various various ADJ jd472v2793h 4 33 irradiation irradiation NOUN jd472v2793h 4 34 scenarios scenario NOUN jd472v2793h 4 35 from from ADP jd472v2793h 4 36 early early ADJ jd472v2793h 4 37 stellar stellar ADJ jd472v2793h 4 38 processes process NOUN jd472v2793h 4 39 . . PUNCT jd472v2793h 5 1 irradiation irradiation NOUN jd472v2793h 5 2 of of ADP jd472v2793h 5 3 ca ca NOUN jd472v2793h 5 4 can can AUX jd472v2793h 5 5 be be AUX jd472v2793h 5 6 tricky tricky ADJ jd472v2793h 5 7 as as SCONJ jd472v2793h 5 8 it it PRON jd472v2793h 5 9 is be AUX jd472v2793h 5 10 tough tough ADJ jd472v2793h 5 11 to to PART jd472v2793h 5 12 make make VERB jd472v2793h 5 13 as as ADP jd472v2793h 5 14 a a DET jd472v2793h 5 15 foil foil NOUN jd472v2793h 5 16 for for ADP jd472v2793h 5 17 activations activation NOUN jd472v2793h 5 18 and and CCONJ jd472v2793h 5 19 chemical chemical NOUN jd472v2793h 5 20 treatment treatment NOUN jd472v2793h 5 21 can can AUX jd472v2793h 5 22 add add VERB jd472v2793h 5 23 even even ADV jd472v2793h 5 24 more more ADJ jd472v2793h 5 25 uncertainty uncertainty NOUN jd472v2793h 5 26 . . PUNCT jd472v2793h 6 1 this this PRON jd472v2793h 6 2 prompted prompt VERB jd472v2793h 6 3 a a DET jd472v2793h 6 4 campaign campaign NOUN jd472v2793h 6 5 to to PART jd472v2793h 6 6 develop develop VERB jd472v2793h 6 7 a a DET jd472v2793h 6 8 novel novel ADJ jd472v2793h 6 9 reaction reaction NOUN jd472v2793h 6 10 technique technique NOUN jd472v2793h 6 11 that that PRON jd472v2793h 6 12 was be AUX jd472v2793h 6 13 tested test VERB jd472v2793h 6 14 at at ADP jd472v2793h 6 15 the the DET jd472v2793h 6 16 nuclear nuclear PROPN jd472v2793h 6 17 science science PROPN jd472v2793h 6 18 laboratory laboratory NOUN jd472v2793h 6 19 at at ADP jd472v2793h 6 20 the the DET jd472v2793h 6 21 university university PROPN jd472v2793h 6 22 of of ADP jd472v2793h 6 23 notre notre PROPN jd472v2793h 6 24 dame dame NOUN jd472v2793h 6 25 . . PUNCT jd472v2793h 7 1 this this DET jd472v2793h 7 2 technique technique NOUN jd472v2793h 7 3 utilizes utilize VERB jd472v2793h 7 4 an an DET jd472v2793h 7 5 " " PUNCT jd472v2793h 7 6 in in ADP jd472v2793h 7 7 - - PUNCT jd472v2793h 7 8 cathode cathode NOUN jd472v2793h 7 9 " " PUNCT jd472v2793h 7 10 reaction reaction NOUN jd472v2793h 7 11 method method NOUN jd472v2793h 7 12 , , PUNCT jd472v2793h 7 13 which which PRON jd472v2793h 7 14 means mean VERB jd472v2793h 7 15 that that SCONJ jd472v2793h 7 16 natural natural ADJ jd472v2793h 7 17 caf2 caf2 NOUN jd472v2793h 7 18 material material NOUN jd472v2793h 7 19 is be AUX jd472v2793h 7 20 packed pack VERB jd472v2793h 7 21 into into ADP jd472v2793h 7 22 an an DET jd472v2793h 7 23 ion ion NOUN jd472v2793h 7 24 source source NOUN jd472v2793h 7 25 sample sample NOUN jd472v2793h 7 26 holder holder NOUN jd472v2793h 7 27 ( ( PUNCT jd472v2793h 7 28 cathode cathode NOUN jd472v2793h 7 29 ) ) PUNCT jd472v2793h 7 30 before before ADP jd472v2793h 7 31 being be AUX jd472v2793h 7 32 irradiated irradiate VERB jd472v2793h 7 33 and and CCONJ jd472v2793h 7 34 then then ADV jd472v2793h 7 35 subsequently subsequently ADV jd472v2793h 7 36 measured measure VERB jd472v2793h 7 37 without without ADP jd472v2793h 7 38 the the DET jd472v2793h 7 39 need need NOUN jd472v2793h 7 40 for for ADP jd472v2793h 7 41 any any DET jd472v2793h 7 42 chemical chemical NOUN jd472v2793h 7 43 processing processing NOUN jd472v2793h 7 44 after after ADP jd472v2793h 7 45 the the DET jd472v2793h 7 46 activation activation NOUN jd472v2793h 7 47 . . PUNCT jd472v2793h 8 1 the the DET jd472v2793h 8 2 setup setup NOUN jd472v2793h 8 3 for for ADP jd472v2793h 8 4 the the DET jd472v2793h 8 5 irradiation irradiation NOUN jd472v2793h 8 6 was be AUX jd472v2793h 8 7 performed perform VERB jd472v2793h 8 8 using use VERB jd472v2793h 8 9 a a DET jd472v2793h 8 10 3he 3he ADJ jd472v2793h 8 11 beam beam NOUN jd472v2793h 8 12 to to PART jd472v2793h 8 13 measure measure VERB jd472v2793h 8 14 the the DET jd472v2793h 8 15 reaction reaction NOUN jd472v2793h 8 16 natca(3he natca(3he PROPN jd472v2793h 8 17 , , PUNCT jd472v2793h 8 18 x)41ca x)41ca PROPN jd472v2793h 8 19 . . PUNCT jd472v2793h 9 1 the the DET jd472v2793h 9 2 activated activate VERB jd472v2793h 9 3 sample sample NOUN jd472v2793h 9 4 was be AUX jd472v2793h 9 5 placed place VERB jd472v2793h 9 6 in in ADP jd472v2793h 9 7 a a DET jd472v2793h 9 8 gamma gamma NOUN jd472v2793h 9 9 counting counting NOUN jd472v2793h 9 10 station station NOUN jd472v2793h 9 11 to to PART jd472v2793h 9 12 measure measure VERB jd472v2793h 9 13 any any DET jd472v2793h 9 14 decay decay NOUN jd472v2793h 9 15 products product NOUN jd472v2793h 9 16 and and CCONJ jd472v2793h 9 17 then then ADV jd472v2793h 9 18 placed place VERB jd472v2793h 9 19 directly directly ADV jd472v2793h 9 20 into into ADP jd472v2793h 9 21 the the DET jd472v2793h 9 22 ion ion NOUN jd472v2793h 9 23 source source NOUN jd472v2793h 9 24 to to PART jd472v2793h 9 25 be be AUX jd472v2793h 9 26 sputtered sputter VERB jd472v2793h 9 27 where where SCONJ jd472v2793h 9 28 its its PRON jd472v2793h 9 29 isotopic isotopic ADJ jd472v2793h 9 30 ratio ratio NOUN jd472v2793h 9 31 of of ADP jd472v2793h 9 32 41ca 41ca PROPN jd472v2793h 9 33 / / SYM jd472v2793h 9 34 natca natca NOUN jd472v2793h 9 35 was be AUX jd472v2793h 9 36 measured measure VERB jd472v2793h 9 37 using use VERB jd472v2793h 9 38 accelerator accelerator NOUN jd472v2793h 9 39 mass mass NOUN jd472v2793h 9 40 spectrometry spectrometry NOUN jd472v2793h 9 41 ( ( PUNCT jd472v2793h 9 42 ams ams PROPN jd472v2793h 9 43 ) ) PUNCT jd472v2793h 9 44 . . PUNCT jd472v2793h 10 1 gamma gamma NOUN jd472v2793h 10 2 spectroscopy spectroscopy NOUN jd472v2793h 10 3 revealed reveal VERB jd472v2793h 10 4 around around ADP jd472v2793h 10 5 2 2 NUM jd472v2793h 10 6 - - SYM jd472v2793h 10 7 3 3 NUM jd472v2793h 10 8 % % NOUN jd472v2793h 10 9 of of ADP jd472v2793h 10 10 the the DET jd472v2793h 10 11 3he 3he ADJ jd472v2793h 10 12 beam beam NOUN jd472v2793h 10 13 missing miss VERB jd472v2793h 10 14 the the DET jd472v2793h 10 15 ca ca NOUN jd472v2793h 10 16 material material NOUN jd472v2793h 10 17 and and CCONJ jd472v2793h 10 18 hitting hit VERB jd472v2793h 10 19 the the DET jd472v2793h 10 20 cu cu PROPN jd472v2793h 10 21 cathode cathode NOUN jd472v2793h 10 22 . . PUNCT jd472v2793h 11 1 ams am NOUN jd472v2793h 11 2 results result NOUN jd472v2793h 11 3 suggest suggest VERB jd472v2793h 11 4 the the DET jd472v2793h 11 5 need need NOUN jd472v2793h 11 6 to to PART jd472v2793h 11 7 measure measure VERB jd472v2793h 11 8 the the DET jd472v2793h 11 9 isotopic isotopic ADJ jd472v2793h 11 10 ratio ratio NOUN jd472v2793h 11 11 of of ADP jd472v2793h 11 12 a a DET jd472v2793h 11 13 sample sample NOUN jd472v2793h 11 14 until until SCONJ jd472v2793h 11 15 all all DET jd472v2793h 11 16 the the DET jd472v2793h 11 17 activated activate VERB jd472v2793h 11 18 material material NOUN jd472v2793h 11 19 has have AUX jd472v2793h 11 20 been be AUX jd472v2793h 11 21 exhausted exhaust VERB jd472v2793h 11 22 while while SCONJ jd472v2793h 11 23 also also ADV jd472v2793h 11 24 accounting account VERB jd472v2793h 11 25 for for ADP jd472v2793h 11 26 geometrical geometrical ADJ jd472v2793h 11 27 effects effect NOUN jd472v2793h 11 28 from from ADP jd472v2793h 11 29 the the DET jd472v2793h 11 30 sputtering sputtering NOUN jd472v2793h 11 31 of of ADP jd472v2793h 11 32 material material NOUN jd472v2793h 11 33 in in ADP jd472v2793h 11 34 the the DET jd472v2793h 11 35 ion ion NOUN jd472v2793h 11 36 source source NOUN jd472v2793h 11 37 . . PUNCT