Average atomic weight: 74.921595(6) u
| Isotope | Fraction | Atomic weight/u |
| 75 | 1(0) | 74.92159457(95) |
Atomic weights and isotopic compositions were obtained from NIST Database 144
As I (As-like): 80 levels, 933 lines (E1: 458 IC: 465 M1: 6 E2: 4), transition probabilities for 16 lines
As II (Ge-like): 166 levels, 2911 lines (E1: 2837 IC: 64 M1: 5 E2: 4 M2: 1), transition probabilities for 2 lines
As III (Ga-like): 83 levels, 805 lines (E1: 553 IC: 247 M1: 3 E2: 1 M2: 1), transition probabilities for 3 lines
As IV (Zn-like): 54 levels, 374 lines (E1: 223 IC: 147 M1: 2 E2: 1 M2: 1), transition probabilities for 20 lines
As V (Cu-like): 8 levels, 10 lines (E1: 10), transition probabilities for 3 lines
As VI (Ni-like): 43 levels, 282 lines (E1: 140 IC: 134 M1: 5 E2: 3), transition probabilities for 2 lines
As VII (Co-like): 49 levels, 93 lines (E1: 33 IC: 18 M1: 21 E2: 21), transition probabilities for 3 lines
As VIII (Fe-like): 1 levels, 0 lines
As IX (Mn-like): 1 levels, 0 lines
As X (Cr-like): 1 levels, 0 lines
As XI (V -like): 1 levels, 0 lines
As XII (Ti-like): 1 levels, 0 lines
As XIII (Sc-like): 1 levels, 0 lines
As XIV (Ca-like): 3 levels, 1 lines (E1: 1), transition probabilities for 0 lines
As XV (K -like): 4 levels, 2 lines (E1: 2), transition probabilities for 0 lines
As XVI (Ar-like): 3 levels, 1 lines (E1: 1), transition probabilities for 0 lines
As XVII (Cl-like): 6 levels, 3 lines (E1: 2 M1: 1), transition probabilities for 1 lines
As XVIII (S -like): 4 levels, 1 lines (E1: 1), transition probabilities for 0 lines
As XIX (P -like): 1 levels, 0 lines
As XX (Si-like): 2 levels, 1 lines (E2: 1), transition probabilities for 0 lines
As XXI (Al-like): 5 levels, 3 lines (E1: 3), transition probabilities for 0 lines
As XXII (Mg-like): 25 levels, 33 lines (E1: 30 M1: 2 E2: 1), transition probabilities for 2 lines
As XXIII (Na-like): 27 levels, 60 lines (E1: 60), transition probabilities for 60 lines
As XXIV (Ne-like): 21 levels, 20 lines (E1: 18 IC: 2), transition probabilities for 0 lines
As XXV (F -like): 50 levels, 83 lines (E1: 54 IC: 28 M1: 1), transition probabilities for 1 lines
As XXVI (O -like): 42 levels, 129 lines (E1: 64 IC: 56 M1: 5 E2: 4), transition probabilities for 2 lines
As XXVII (N -like): 1 levels, 0 lines
As XXVIII (C -like): 1 levels, 0 lines
As XXIX (B -like): 2 levels, 1 lines (M1: 1), transition probabilities for 1 lines
As XXX (Be-like): 8 levels, 11 lines (E1: 4 IC: 7), transition probabilities for 0 lines
As XXXI (Li-like): 3 levels, 2 lines (E1: 2), transition probabilities for 2 lines
As XXXII (He-like): 27 levels, 117 lines (E1: 76 IC: 41), transition probabilities for 72 lines
As XXXIII (H -like): 100 levels, 918 lines (E1: 918), transition probabilities for 918 lines
(Atomic Line List v3.00b5)
