arXiv subjects

Leif Holmlid

Publications and source records attributed to Leif Holmlid.

9 recordsLinked to original sources

arXiv2023

Response to Comment on Ultradense protium p(0) and deuterium D(0) and their relation to ordinary Rydberg matter: a review [Physica Scripta 94 (2019) 075005]

In this answer to the Comment by Hansen and Engelen it is shown, that if there is any violation of the baryon number conservation law in H(0) nuclear reactions, it is not at all of the form that the authors believe. Their belief is disproved by cited well-known scientific results from other groups. It is further shown that quantum mechanics in H(0) molecules is different than these authors believe, not formulated in kinetic energy terms but defined by angular momentum quantization. Repetition of experiments is required, not pondering by non-specialists.

physics.chem-ph↗

arXiv2022

Response to "Comment on 'Phase transition temperatures of 405-725 K in superfluid ultra-dense hydrogen clusters on metal surfaces' [AIP Advances 6, 045111 (2016)]"

In this invited response we answer all comments by Engelen and Hansen [arXiv:2207.07844]. We point out that the superfluid and superconductive properties of H(0) have been published previously. We explain some differences between covalently bonded molecules and the molecules in the ultradense matter H(0) form, and explain some aspects of the energetics of H(0) molecules during Coulomb explosions. We point out that the experimental spectra shown in our publication are not ion time-of-flight spectra but neutral time-of-flight spectra with the peak width given by the internal energetics and not by experimental factors. We point out that no phase diagram has been measured for H(0). Further we point out that a Rydberg state is a hydrogenic state and thus that all hydrogen atom states are Rydberg states. That Rydberg states always have large principal quantum numbers is a complete misunderstanding. We point out that a QM description of H(0) is published. We point out that the internuclear distances in p(0), D(0) and pD(0) have been measured by rotational spectroscopy in two publications for three different spin states. They are measured in the pm range with fm precision.

physics.atm-clus↗

arXiv2016

Comment on "K. Hansen, Int. J. Mass Spectrom. 399-400 (2016)51"

The comment by K. Hansen suggests that the time-of-flight mass spectrometry data in one table in our paper from 2103 in IJMS should be due to a proton contamination and correspond to protons p instead of deuterons D. The evidence for such a suggestion is a re-plotting of our data, giving a bond distance of 5.0 pm instead of 2.3 pm, corresponding to state s = 3 instead of s = 2 in the ultra-dense hydrogen. However, protium has indeed been studied on the next pages in our paper, giving shorter time-of-flights as expected. A replotting of our protium results as suggested by Hansen gives a best fit mass of 0.6 u, showing that the suggested procedure gives consistently too small mass. Hansen also rejects the rotational energy transfer model as due to our use of D in the analysis of the data. However, this model has been applied successfully in two previous publications, including experiments using protium. Hansen also suggests that the protium is due to a contamination of the source; however, the gas feed (H2 or D2) and its result is well controlled and monitored. The most likely source of protons was instead laser-induced nuclear fusion, but the laser intensity in these experiments was a factor three too low to give strong fusion. Thus, the suggestion by Hansen is not valid.

physics.atm-clus↗

arXiv2015

Neutral multi-MeV/u particles from laser-induced processes in ultra-dense deuterium D(0): accurate two-collector timing and magnetic analysis

Laser-induced processes in ultra-dense deuterium D(0) layers eject multi-MeV u-1 particles using ns laser pulse energies of <200 mJ. Such particles have been observed previously as mA currents to time-of-flight (TOF) collectors at up to 1 m distance. The signal current is mainly due to the ejection of secondary electrons by impinging MeV particles on the collectors. Improved two-collector time-of-flight measurements now show that the energy of the particles is in the range 1-50 MeV u-1. Their distributions are almost thermal at up to 13 MeV u-1 or are sharper than thermal. The fastest sharp peak may indicate shock-wave acceleration by many-body energy transfer. A magnetic field of 0.4 T deflects only a small part of the multi-MeV particle flux which thus mainly consists of neutral particles. By combining the TOF method with magnetic deflection, it is ascertained that the multi-MeV particles are studied and not any slower particle emission from the target. The neutral multi-MeV particles are concluded to be fragments of ultra-dense hydrogen HN(0) as observed in other experiments.

nucl-ex↗

arXiv2013

Direct observation of particles with energy >10 MeV/u from laser-induced fusion in ultra-dense deuterium

Nuclear fusion in ultra-dense deuterium D(-1) induced by 0.2 J pulses with 5 ns pulse length ejects ions with energies in the MeV range. The ns-resolved signal to a collector can be observed directly on an oscilloscope, showing ions arriving with energies in the range 2-14 MeV u-1 at flight times 12-100 ns, mainly protons from the fusion process and deuterons ejected by proton collisions. Electrons and photons give almost no contribution to the fast signal. The observed signal at several mA peak current corresponds to 1x10^13 particles released per laser shot and to an energy release > 1 J assuming isotropic formation and average particle energy of 3 MeV as observed. A movable slit close to the laser target gives spatial resolution of the signal generation, showing almost only fast ions from the point of laser impact and penetrating photons from the plasma outside the laser impact point. The initial photon pulse from the fusion process is observed by a photomultiplier detector on-line.

physics.ins-det↗

arXiv2011

Diffuse interstellar bands (DIB): co-planar doubly excited He and metal atoms embedded in Rydberg Matter

The interpretation of the more than 300 diffuse interstellar bands (DIBs) is one of the most long-standing problems in interstellar spectra since the two first bands were reported in 1921. We now predict the frequencies of 260 diffuse interstellar bands (DIBs) using the Rydberg Matter model we have developed previously. These transitions involve mainly He atoms, but other two-electron atoms like Ca and other metals can take part in the absorption processes. Approximately 70% of the total intensity of the DIBs is due to absorption in doubly excited states and 30% in singly excited He atoms. The doubly excited states are in inverted states while the He atoms are thermal. The possibilities to observe DIBs in the UV and NIR ranges are discussed and band positions are predicted.

astro-ph.GA↗

arXiv2010

Rydberg Matter clusters of alkali metal atoms: the link between meteoritic matter, polar mesosphere summer echoes (PMSE), sporadic sodium layers, polar mesospheric clouds (PMCs, NLCs), and ion chemistry

A material exists which links together the influx of meteoritic matter from interplanetary space, the polar mesosphere summer echoes (PMSE), the sporadic sodium layers, the polar mesospheric clouds (PMCs, NLCs), and the observed ion chemistry in the mesosphere. The evidence in these research fields is here analyzed and found to agree well with the properties of Rydberg Matter (RM). This material has been studied with numerous methods in the laboratory. Alkali atoms, mainly Na, reach the mesosphere in the form of interplanetary (meteoritic, cometary) dust. The planar RM clusters NaN usually contain N = 19, 37 or 61 atoms, and have the density of air at 90 km altitude where they float. The diameters of the clusters are 10-100 nm from laboratory high precision radio frequency spectroscopic studies. Such experiments show that RM clusters interact strongly with radar frequencies: this explains the radio frequency heating and reflection studies of PMSE layers. The clusters give the low temperature in the mesosphere by efficient selective radiation at long wavelengths, which is observed in RF emission experiments. The lowest possible stable temperature of the mesopause is calculated for the first time to be 121 K in agreement with measurements, based on the strong optical activity at long wavelengths in RM. Sporadic sodium layers are explained in a unique way as due to shockwaves in the RM layers. Due to the high electronic excitation energy in RM clusters, they induce efficient reactions forming ions of all atoms and molecules in the atmosphere thus providing condensation nuclei for water vapour. This finally gives the visible part of the PMC structure. The present contribution fills the gap between and partially replaces the separate theories used to describe the various aspects of these intriguing phenomena.

astro-ph.EP↗

arXiv2007

Electronic transitions in Rydberg Matter as the source of the unidentified infrared bands (UIR) observed in interstellar space

Rydberg Matter (RM) theory is previously shown to give good agreement with the unidentified infrared bands (UIR, UIB) that are observed in emission from many objects in space. From stimulated emission studies in RM, a slightly simpler theoretical model is found that describes the transitions giving the UIR bands better. The general theory for RM was recently shown to be very accurate using rotational spectroscopy to observe several types of RM clusters (Mol. Phys. 105 (2007) 933). Two different large studies of UIR are now interpreted with the improved model. High-resolution UIR observations by Beintema et al. are interpreted as transitions from high levels n = 40 - 80 down to levels n = 5 - 12 in the final state. The upper level quantum numbers for the observed bands agree well with those found in experiments. The stationary UIR bands at 3.3 and 11.3 micrometer are due to deexcitation n = 9 -> 5 and 9 -> 7 of Rydberg species through stimulated emission. The other UIR bands vary considerably in wavelength in different environments and even with time as seen in numerous observational studies. Their great variability is difficult to model by the commonly used PAH model, but is a natural consequence of the varying excitation state of RM.

astro-ph↗

arXiv2006

Precision bond lengths for Rydberg Matter clusters KN (N = 19, 37, 61 and 91) in excitation levels n = 4 - 8 from rotational radio-frequency emission spectra

Clusters of the electronically excited condensed matter Rydberg Matter (RM) are planar and six-fold symmetric with magic numbers N = 7, 19, 37, 61 and 91. The bond distances in the clusters are known with a precision of +- 5% both from theory and Coulomb explosion experiments. Long series of up to 40 consecutive lines from rotational transitions in such clusters are now observed in emission in the radio-frequency range 7-90 MHz. The clusters are produced in five different vacuum chambers equipped with RM emitters. The most prominent series with B = 0.9292 +- 0.0001 MHz agrees accurately with expectation (within 2%) for the planar six-fold symmetric cluster K19 in excitation level n = 4. Other long series agree even better with K19 at n = 5 and 6. The ratio between the interatomic distance and the theoretical electron orbit radius (the dimensional ratio) for K19 in n = 4 is found to be 2.8470 +- 0.0003. For clusters K19 (n = 6) and K37 (n = 7 and 8) the dimensional ratio 2.90 is the highest value that is found, which happens to be exactly the theoretical value. Clusters K61 and K91 in n = 5 and 6 have slightly lower dimensional ratios. This is expected since the edge effects are smaller. Intensity alternations are observed of approximately 7:3. The nuclear spins interact strongly with the magnetic field from the orbiting electrons. Spin transitions are observed with energy differences corresponding accurately (within 0.6%) to transitions with apparent total (delta)F = -3 at excitation levels n = 5 and 6. The angular momentum coupling schemes in the clusters are complex but well understood.

physics.atm-clus↗