Table 1 Positron lifetimes τ_i and relative intensities I_i of components measured by PALS in reference W samples and W samples irradiated with fission neutrons in the LVR-15 reactor at sample temperature of about 370 K.

WR

Recrystallized at 2000 K for 40 min

105(1)

100

–

–

–

–

–

WR_LVR1

n⁰-irradiated, F = 1.66 × 10²⁰ m⁻²

95(5)

86(1)

244(3)

14(1)

1.4(2)

3.1(2)

4.5(5)

WR_LVR2

n⁰-irradiated, F = 2.1 × 10²⁰ m⁻²

92(4)

84(1)

289(3)

16(1)

1.3(1)

5.0(2)

6.6(5)

WR_ LVR3

n⁰-irradiated, F = 5.1 × 10²⁰ m⁻²

86(4)

74(1)

261(3)

26(1)

2.8(2)

3.8(2)

10.5(5)

WR_ LVR4

n⁰-irradiated, F = 1.56 × 10²¹ m⁻²

70(5)

54(2)

245(5)

46(2)

7.0(5)

3.4(5)

24(1)