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| sample (source) | analysis | U chain g/day |
Th chain g/day |
K g/day |
comments | |
| by | method | |||||
| Capacitor (Homestake) | W | GES | 95 - 1900(a) | 50 - 1000(b) | < 110 - 900 | |
| Diode (Homestake) | W | GES | < 30 - 60(a) | 20(b) | 460 - 610 | |
| Electronics (EMI PMs) | S | GES? | ~ 30 | ~ 10 | ~ 4 | |
| Inductor (Homestake) | W | GES | 950(a) | 2100(b) | 230 | |
| Mu-metal (Bicron) | S | GES | 1.4(2) × 104(c) | < 40(d) | 1400(500) | (for 3" PM) |
| Mu-metal (Homestake) | W | GES | 3.2 × 104(a) | < 210(b) | 3300 | (for 3" PM?) |
| O-ring (Homestake) | W | GES | < 160 - 1600(a) | < 320(b) | < 300 | |
| PM tube, 2" (EMI low b/g) | S | GES? | 2.1(9) × 104 | 1.8(5) × 104 | 6800(1100) | from components |
| PM tube, 2" (EMI low b/g) | - | - | ~ 4000 | ~ 2000 | ~ 1000 | 92/93 goal |
| PM tube, 2" (EMI best UV) | S | GES? | ~ 6 × 104 | ~ 3 × 104 | ~ 3 × 104 | |
| PM tube, 3" (Bicron) | S | GES | 2.3(2) × 104(c) | 5300(1500)(d) | 1.46(5) × 104 | |
| PM tube, 3" (EMI low b/g) | S | GES? | 6.5(9) × 104 | 3.4(10) × 104 | 1.1(2) × 104 | |
| PM tube, 3" (EMI low b/g) | S | GES? | 30(12) × 103 | 2.6(6) × 104 | 1.0(1) × 104 | from components |
| PM tube, 3" (EMI low b/g) | - | - | ~ 6000 | ~ 3000 | ~ 1500 | 92/93 goal |
| PM tube, 3" (EMI best UV) | S | GES? | ~ 105 | ~ 5 × 104 | ~ 4 × 104 | |
| PM tube (ET 9823B) | S | GES? | 5.1(2) × 105 | 2.43(8) × 105 | 8.5(4) × 104 | |
| PM tube (ET9823QB) | S | GES? | 4.4(3) × 105 | 2.0(1) × 105 | 3.5(3) × 105 | quartz window |
| PM tube, 3" (Homestake) | W | GES | 5.1 × 104 - 1.05 × 105(a) | 3.2 × 104 - 1.1 × 105(b) | 3 × 104 - 3.8 × 105 | |
| PM tube, 5" (EMI 9390 B53) | S | 3(2) × 104 | 1.1(3) × 104 | 8(2) × 103 | ||
| PM tube, 5" (Hamamatsu R1512) | S | ~ 105 | ~ 2 × 104 | ~ 105 | `K-free'(!) | |
| PM tube, 5" (Hamamatsu R1512) | S | ~ 104 | ~ 104 | ~ 104 | low b/g | |
| PM tube, 8" (ET 9354B) | S | GES? | 5(3) × 104 | 2.3(7) × 104 | 1.6(4) × 104 | low b/g |
| Resistor (Allen-Bradley) | I | NAA | 6.5(5) | 4.4(1) | 0.86(3) | without leads |
| Resistor (Homestake) | W | GES | 32 - 950(a) | 32 - 2100(b) | < 50 - 1200 | |
| Transistor (Homestake) | W | GES | 32 - 63(a) | 42(b) | < 30 - 50 | |
| Analysts: | Analysis methods: |
| I: ICI Tracerco | GES: Gamma Emission Spectroscopy |
| S: supplier's data | NAA: Neutron Activation Analysis |
| W: N. A. Wogman et al. |
Notes:
| (a): | from 214Bi g count, U chain assumed in equilibrium; 2.20 gs in chain. |
| (b): | from 208Tl g count, Th chain assumed in equilibrium; 2.65 gs in chain. |
| (c): | from 226Ra g count, U chain assumed in equilibrium; 2.20 gs in chain. |
| (d): | from 228Ac g count, Th chain assumed in equilibrium; 2.65 gs in chain. |
Other remarks:
