Table 1 Measured results in the Beta Analytic laboratory

From: A rapid cosmic-ray increase in BC 3372–3371 from ancient buried tree rings in China

Year (bc)

Δ14C (‰)

Errora

δ 13C (‰)

3388

68.47

2.6

−24.9

3383

65.06

2.5

−26.6

3379

67.05

2.4

−26.0

3378

67.62

2.5

−25.6

3377

63.19

2.5

−26.1

3376

67.58

2.48

−25.2

3375

65.86

2.5

−26.3

3374

62.87

2.5

−25.6

3373

66.10

2.49

−24.7

3372

65.03

1.8

−25.4

3371

74.48

2.1

−24.6

3370

70.10

2.5

−25.7

3369

72.44

2.48

−26.4

3368

69.65

2.5

−25.4

3367

68.63

2.48

−25.6

3365

68.15

2.5

−25.5

3363

69.63

2.5

−25.9

3358

67.43

2.5

−24.8

  1. aThe error of Δ14C is calculated from error propagation. In the calculation, the error of the fraction of modern carbon F is considered
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