Sample

From

Sample

Weight

(grams).

^137mBa

count/sec. (mass. spect.)

¹³⁷Cs

Atoms

number

³⁹K

c/sec.

(mas.spect.)

⁴⁰K

Atoms

number

pg¹³⁷Cs/g. sample

Nautico

1.0644

5.98 × 10⁴

3.7 × 10¹¹

7.03 × 10⁷

8.92 × 10³

79.

Guanabo

1.0103

2.90 × 10⁴

1.8 × 10¹¹

7.63 × 10⁷

9.68 × 10³

41

Bibijagua

1.0227

4.17 × 10⁴

2.6 × 10¹¹

1.36 × 10⁸

1.72 × 10⁴

58

Batabano

1.0168

3.10 × 10⁴

1.92 × 10¹¹

5.75 × 10⁷

7.30 × 10³

43